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Forum Discussion
2TB WD20EARS HCL Advanced Format 4k Sectors TLER LCC WDidle3
EDIT: This thread was written before the Readynas group had recognized and addressed the WD Advanced Format HDD's. An issue that remains to this day is the massive LCC(Load Cycle Count) increases due to the original HDD Firmware.
I believe the end of year 2012 WD Red drives address most of the issues that plagued the WD20EARS and WD20EARX but I have not confirmed this.
The LLC (Load Cycle Count) for a majority of my drives has now approached 3Million. Yes Three Million.
There appears to be a New WD20EARS-00MVWB0 which has 3 Platters. As yet untested. http://forums.vr-zone.com/hardware-aren ... etter.html
WDidle3_1_05.zip info works with WD20EARS HDD's viewtopic.php?p=233472#p233472
WD20eaRs HDD's 4KB Alignment issues appears to be FIXED with firmware 4.2.12-T9 viewtopic.php?p=238394#p238394
The SPARC 4KB Fixed Alignment firmware version is looking to be done by July 2010 as mentioned here. viewtopic.php?p=242472#p242472
2TB WD20EARS HCL, Advanced Format 4k Sectors, TLER(Time Limited Error Recovery), LCC(Load_Cycle_Count) info
After reading a fair bit online about the new WD Caviar Green/GP HDD's by WD such as the WD20EARS and their newish 4k sector size,
I am left wondering if the ReadyNAS firmware(existing or Beta) has been updated for this new HDD Sector design?
Could one of the JEDI or anyone else please comment on the following information?
Sorry for what appears like a jumble of information following but its hard to know where to start,
when all i really want is for it to be on the HCL as it is the only WD HDD commonly available here in Melbourne Australia.
This is a very good clear explaination about the 4096B Sector size that replace the historical 512B size
http://www.anandtech.com/show/2888
Western Digital Advanced Format What WD have to say which is not very helpful when it comes to linux.
http://www.wdc.com/en/products/advancedformat/index.asp
I have read that TLER is enabled on the WD20EARS. Can anyone here confirm(x seconds) as info is conflicting?
Also the old HDD utilities for spinup and TLER are no longer supported by WD for the EARS drives.
Knowledge Base WD Caviar Green / GP
http://support.wdc.com/product/kb.asp?g ... 08&lang=en
From what I have read do not use the 7-8 Jumper for XP compatibility mode due to more than single partition issue.
Jumper Settings WD20EARS
http://wdc.custhelp.com/cgi-bin/wdc.cfg ... ed=#jumper
ReadyNAS related Fix? Is this already implemented?
Linux Fix according to WD knowledge base
http://wdc.custhelp.com/cgi-bin/wdc.cfg ... faqid=5357
Problem: The Load/Unload counter for S.M.A.R.T Attribute 193 continues to increase under some distributions of the Linux Operating system.
Any Links I have missed please add, especially form here.
I believe the end of year 2012 WD Red drives address most of the issues that plagued the WD20EARS and WD20EARX but I have not confirmed this.
The LLC (Load Cycle Count) for a majority of my drives has now approached 3Million. Yes Three Million.
There appears to be a New WD20EARS-00MVWB0 which has 3 Platters. As yet untested. http://forums.vr-zone.com/hardware-aren ... etter.html
WDidle3_1_05.zip info works with WD20EARS HDD's viewtopic.php?p=233472#p233472
WD20eaRs HDD's 4KB Alignment issues appears to be FIXED with firmware 4.2.12-T9 viewtopic.php?p=238394#p238394
The SPARC 4KB Fixed Alignment firmware version is looking to be done by July 2010 as mentioned here. viewtopic.php?p=242472#p242472
2TB WD20EARS HCL, Advanced Format 4k Sectors, TLER(Time Limited Error Recovery), LCC(Load_Cycle_Count) info
After reading a fair bit online about the new WD Caviar Green/GP HDD's by WD such as the WD20EARS and their newish 4k sector size,
I am left wondering if the ReadyNAS firmware(existing or Beta) has been updated for this new HDD Sector design?
Could one of the JEDI or anyone else please comment on the following information?
Sorry for what appears like a jumble of information following but its hard to know where to start,
when all i really want is for it to be on the HCL as it is the only WD HDD commonly available here in Melbourne Australia.
This is a very good clear explaination about the 4096B Sector size that replace the historical 512B size
http://www.anandtech.com/show/2888
With the emulation of 512B sectors, there’s the risk that a partition could be misaligned compared to the 4K physical sectors - where it would be unwittingly started in the middle of such a sector. As a result, the clusters of a file system on that partition would end up straddling 4K sectors, which would cause performance problems.
In order to solve the misalignment issue, Western Digital is offering two solutions. The first solution for correcting misaligned partitions is specifically geared towards Win 5.x, and that is an option on the drive itself to use an offset. Through the jumpering of pins 7 and 8 on an Advanced Format drive, the drive controller will use a +1 offset, resolving Win 5.xx’s insistence on starting the first partition at LBA 63 by actually starting it at LBA 64, an aligned position. This is exactly the kind of crude hack it sounds like since it means the operating system is no longer writing to the sector it thinks its writing to, but it’s simple to activate and effective in solving the issue so long as only a single partition is being used. If multiple partitions are being used, then this offset cannot be used as it can negatively impact the later partitions. The offset can also not be removed without repartitioning the drive, as the removal of the offset would break the partition table.
Western Digital Advanced Format What WD have to say which is not very helpful when it comes to linux.
http://www.wdc.com/en/products/advancedformat/index.asp
I have read that TLER is enabled on the WD20EARS. Can anyone here confirm(x seconds) as info is conflicting?
Also the old HDD utilities for spinup and TLER are no longer supported by WD for the EARS drives.
Knowledge Base WD Caviar Green / GP
http://support.wdc.com/product/kb.asp?g ... 08&lang=en
From what I have read do not use the 7-8 Jumper for XP compatibility mode due to more than single partition issue.
Jumper Settings WD20EARS
http://wdc.custhelp.com/cgi-bin/wdc.cfg ... ed=#jumper
ReadyNAS related Fix? Is this already implemented?
Linux Fix according to WD knowledge base
http://wdc.custhelp.com/cgi-bin/wdc.cfg ... faqid=5357
Problem: The Load/Unload counter for S.M.A.R.T Attribute 193 continues to increase under some distributions of the Linux Operating system.
Affected Models: WD20EADS, WD20EARS, WD15EADS, WD15EARS, WD10EADS, WD10EARS, WD8000AARS, WD7500AADS, WD7500AARS, WD6400AADS, WD6400AARS, WD5000AADS, WD5000AARS
some implementations of Linux, for example, are not optimized for low power storage devices and can cause our drives to wake up at a higher rate than normal.
Solution:
The number of systems using such applications and utilities is limited and customers can resolve this symptom by optimizing their systems with the following three options depending on requirements.
Do not wake up the drives unnecessarily every 10 to 30 seconds or so, thereby gaining substantial power savings and eliminating excess activity. Increasing logging to every 2 minutes would result in 525,600 minutes per year or 262,800 cycles per year. Increase to 5 minutes and cycles would not even be a factor.
a. Linux users: Decrease the logging message
i. Examine your /etc/syslog.conf file for unnecessary logging activity and to optimize its performance. If you don't want to log any system activity, consider disabling syslogd and klogd entirely; or, at the very least, minimize the amount of logging your system performs. You can also prefix each entry with the minus sign (-) to omit syncing the file after each log entry. This will log anything with a priority of info or higher, but lower than warning, to /var/log/messages or /var/log/mail without needing to sync to disk after each write. Since we want to keep all messages with a priority of warning, this will be logged to a different file without disabling disk syncing (to prevent data loss in the event of a system crash).
*.warning /var/log/syslog
*.info;*.!warning;mail.none -/var/log/messages
mail.info;mail.!warning -/var/log/mailii. Another item to be aware of is the -- MARK -- messages that syslogd(8) writes. This will affect your hard drive inactivity settings. You can simply disable this by running syslogd(8) with:
if [ -x /usr/sbin/syslogd -a -x /usr/sbin/klogd ]; then
# '-m 0' disabled 'MARK' messages
/usr/sbin/syslogd -m 0
sleep 1
# '-c 3' displays errors on console
# '-x' turns off broken EIP translation
/usr/sbin/klogd -c 3 -x
fi
b. Modify OS power management timers in control panel
Disable Advanced power management using standard ATA command (Uses more power as turns off all low power modes but results in no load/unload cycles)
Linux users add following (hdparm -B 255 /dev/sdX where X is your hard drive device)
ATA users can disable APM usually controlled via BIOS and/or OS.ATA users can disable APM usually controlled via BIOS and/or OS.
Set Idle3 to max time (effectively turns off load/unload power saving feature thus will use more power) per below link
Any Links I have missed please add, especially form here.
30 Replies
- Well a week on I have installed 6x2TB WD20EARS HDDs into A ReadyNas Pro Pioneer and Its running fine for the moment,
with the exception of the LCC (Load Cycle Count) which is rising too fast for anybodys liking.
I read somewhere that the WD20EARS is designed for around 1,000,000 LCC and at the rate of around 3000 per day thats 1000000/3000=333.3' Days for design life failure..
A guesstimation forcast of less than a year before harddrive failures.
NOT GOOD! and NOT Acceptable!!
Who has the solution, Netgear, infrant or Western Digital?Linux Fix according to WD knowledge base
http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=5357
Problem: The Load/Unload counter for S.M.A.R.T Attribute 193 continues to increase under some distributions of the Linux Operating system.Solution:
The number of systems using such applications and utilities is limited and customers can resolve this symptom by optimizing their systems with the following three options depending on requirements.
Do not wake up the drives unnecessarily every 10 to 30 seconds or so, thereby gaining substantial power savings and eliminating excess activity. Increasing logging to every 2 minutes would result in 525,600 minutes per year or 262,800 cycles per year. Increase to 5 minutes and cycles would not even be a factor.
a. Linux users: Decrease the logging message
i. Examine your /etc/syslog.conf file for unnecessary logging activity and to optimize its performance. If you don't want to log any system activity, consider disabling syslogd and klogd entirely; or, at the very least, minimize the amount of logging your system performs. You can also prefix each entry with the minus sign (-) to omit syncing the file after each log entry. This will log anything with a priority of info or higher, but lower than warning, to /var/log/messages or /var/log/mail without needing to sync to disk after each write. Since we want to keep all messages with a priority of warning, this will be logged to a different file without disabling disk syncing (to prevent data loss in the event of a system crash).
*.warning /var/log/syslog
*.info;*.!warning;mail.none -/var/log/messages
mail.info;mail.!warning -/var/log/mailii. Another item to be aware of is the -- MARK -- messages that syslogd(8) writes. This will affect your hard drive inactivity settings. You can simply disable this by running syslogd(8) with:
if [ -x /usr/sbin/syslogd -a -x /usr/sbin/klogd ]; then
# '-m 0' disabled 'MARK' messages
/usr/sbin/syslogd -m 0
sleep 1
# '-c 3' displays errors on console
# '-x' turns off broken EIP translation
/usr/sbin/klogd -c 3 -x
fi
b. Modify OS power management timers in control panel
Disable Advanced power management using standard ATA command (Uses more power as turns off all low power modes but results in no load/unload cycles)
Linux users add following (hdparm -B 255 /dev/sdX where X is your hard drive device)
ATA users can disable APM usually controlled via BIOS and/or OS.ATA users can disable APM usually controlled via BIOS and/or OS.
Set Idle3 to max time (effectively turns off load/unload power saving feature thus will use more power) per below link
1. Does anyone know if ReadyNAS or WD has a related Fix?
2. Is this already implemented in a ReadyNasPro beta firmware or elswhere?
3. Can this be made as a Selectable option in FrontView (Please)?
4. Can the Jedi (anyone here) confirm/deny the use of WDidle3_1_05.zip or other tools as working with WD20EARS HDDs in the ReadyNasPro?
http://support.wdc.com/product/download.asp?groupid=609&sid=113&lang=en
Some comment or links please... - Too bad you didn't read the following thread before purchasing WD20EARS disks.
viewtopic.php?f=24&t=39737
Can you return them to your reseller? claykin wrote: Too bad you didn't read the following thread before purchasing WD20EARS disks.
viewtopic.php?f=24&t=39737
Can you return them to your reseller?
I actually spoke with Netgear directly about the WD20EARS and was told that the drive would be ok
I especially spoke to netgear about the 4k cluster size and about possible mis-alignment problems in regards to WD's new Advanced Formating and they said no problem....
I'm not so sure as I'm only getting 22MB/s writes (8Gb file copy) with jumbo frames on Giga LAN through a netgear GS108 but I do get 75MB/s reads for a 8GB file copy over CIFS while running XRaid2 dual redundancy.
The LCC was going to be the issue long term as Western Digital states 1 Million cycles life when currently i am projecting 2-3 years for the drives as its looking like over 300,000 per year guaranteed.
Unfortunatly the spec page from WD state otherwise.
http://www.wdc.com/wdproducts/library/SpecSheet/ENG/2879-701229.pdf
Load/unload cycles 300,000
Does this actually=LCC ?
http://www.wdc.com/en/products/products.asp?DriveID=773
I also read somewhere that the WD20EARS does have TLER (time limed error recovery) which was in contrast to wiki, but wiki is not always right.
In reply to PMMrCyberdude wrote: Hard to answer right now as I'm still migrating 6Tb of data across from one NAS to the readynaspro.
Hostname: ReadyNasPro
Model: ReadyNAS Pro Pioneer Edition [X-RAID2]
Serial: 1YA59CR?x?x?x
Firmware: RAIDiator 4.2.9
Memory: 1024 MB [4-5-5-15 DDR2]
IP address 1: 192.168.1.111
IP address 2: Not Connected
Volume C: Online, X-RAID2, 6 disks, 85% of 7413 GB used
I am running 6 x WD20EARS with jumbo frames and the jumbo does make a difference.
and they seem steady for the moment, I do feel that the RNPP does need a ram upgrade.
Thats next.
I'm feeling that running XRaid2 with 2 x redundancy might be significantly slower than single redundancy. I didn't really research as I needed double redundancy and that was that as my budget was limited....
Hmmmm its hard to say limited budget and $3400 in the same breath,
but u get what i mean. RNPP 8 x WD20EARS HDD
With Win7 and netgear GS108 Jumbo and using CIFS,
I'm getting around 25 MB/s for files less than a gig so I'm thinking its memory related.
Because copying a 7.79 GB (8,370,782,376 bytes) file to the NAS takes 6:20 secs or 20.5 MB/s and 1:55 secs from the NAS to the Win7 PC so 67.7 MB/sec
20.5 MB/s to NAS
67.7 MB/s from NAS
=======================
SMART Information for Disk 1
Model: WDC WD20EARS-00S8B1
Serial: WD-WCAVY258?x?x?
Firmware: 80.00A80
SMART Attribute
Raw Read Error Rate 0
Spin Up Time 8691
Start Stop Count 21
Reallocated Sector Count 0
Seek Error Rate 0
Power On Hours 252
Spin Retry Count 0
Calibration Retry Count 0
Power Cycle Count 19
Power-Off Retract Count 13
Load Cycle Count 9313
Temperature Celsius 40
Reallocated Event Count 0
Current Pending Sector 0
Offline Uncorrectable 0
UDMA CRC Error Count 0
Multi Zone Error Rate 0
ATA Error Count 0
=======================
actually did the copy again when my system wasn't doing other tasks and got
copying a 7.79 GB (8,370,782,376 bytes) file to the NAS took 5:55 secs or ~=22 MB/s
and 1:40 secs from the NAS to the Win7 PC so 77.9MB/sec i.e.~=7790MB/100secs
22.0 MB/s write to NAS
77.9 MB/s read from NAS- I still don't like the look of that Load Cycle Count. I still wouldn't recommend using WD Green disks because of that.
You can try to use the WDIDLE3 utility but it will void the warranty of your disks, I believe and may damage them.
EDIT: WDIDLE3 will not void your warranty as per HanSolo and WD conversation.mdgm wrote: I still don't like the look of that Load Cycle Count. I still wouldn't recommend using WD Green disks because of that.
You can try to use the WDIDLE3 utility but it will void the warranty of your disks, I believe and may damage them.
I tend to agree about not purchasing these drives in future,
but in Melbourne that was all they had and I had the old x6/600 lose a drive so i bit the bullet and got the ReadyNasProPioneer RNPP that I am now having serious thoughts about taking back for a refund.
I did speak to netgear and they confirmed the WD20EARS and Advanced Format with their top level engineer.
I specifically asked about 4k cluster size and Advanced Format mis-alignment performance issues.
Question @mdgm.
This seems slower than expected... Is this normal for RAID Level X-RAID2, 6 disks (with dual redundancy).???
22.0 MB/s write to NAS
77.9 MB/s read from NASMrCyberdude wrote:
but in Melbourne that was all they had
There are drives on the HCL that you can purchase in Melbourne.MrCyberdude wrote:
Question @mdgm.
This seems slower than expected... Is this normal for RAID Level X-RAID2, 6 disks (with dual redundancy).???
22.0 MB/s write to NAS
77.9 MB/s read from NAS
I don't have a Pro yet, but I'd like to get one. There are a number of factors which can effect speeds such as the performance settings you've made in Frontview, the speed of the hard disk in your computer, processor speed etc., what you are transferring e.g. large or small files? There is also other traffic on the network and other tasks being performed by the ReadyNas and I'm sure some other things I haven't mentioned to take into account.
Anyway, the Definitive Guide although it doesn't have speeds for dual-redundancy (it does have speeds for RAID-6) suggests that the Pro is capable of fairly similar read/write speeds (well a lot more similar than what yours are). Your read speeds look fairly good (not knowing your setup), but the write speeds do look a bit low.There are drives on the HCL that you can purchase in Melbourne.
Not at a reasonable price, not when you need 8 x TheSameTypeBrand, Not when its nearly a 400Km return trip.I did speak to netgear and they confirmed the WD20EARS and Advanced Format with their top level engineer.
From above post
I had trouble pinning down X-RAID2, 6 disks (with dual redundancy), any links you can name?actually did the copy again when my system wasn't doing other tasks and got
copying a 7.79 GB (8,370,782,376 bytes) file to the NAS took 5:55 secs or ~=22 MB/s
and 1:40 secs from the NAS to the Win7 PC so 77.9MB/sec i.e.~=7790MB/100secs
22.0 MB/s write to NAS
77.9 MB/s read from NAS- After installing this add-on HDD internal benchmark - debug - test - CIFS - NFS add-on found here in its first release for the x86 versions http://www.readynas.com/contributed/super-poussin/PRO-Bonnie_1.1.bin
This test apeared to take much longer (1 hour) than it should of and I personally believe it is due to the 4k cluster overlap issues with Advanced Format.Version 1.96 ------Sequential Output------ --Sequential Input- --Random-
Mon May 10 02:51:10 EST 2010 HardDisk Test Results are available !.
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ReadyNasPro 2G 760 88 20656 4 17189 4 734 55 147995 26 218.3 3
Latency 9958us 2174ms 1951ms 1518ms 101ms 100ms
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
ReadyNasPro 256 239 99 302797 99 21390 19 259 99 314931 99 325 49
Latency 406ms 664us 432us 444ms 60us 4932ms
Mon May 10 02:51:10 EST 2010 DD Result:91.5MB/s
Mon May 10 02:51:10 EST 2010 DD Result...
Mon May 10 02:49:26 EST 2010 Please Wait...
Mon May 10 02:49:26 EST 2010 DD Test...
Mon May 10 01:55:53 EST 2010 Please Wait...
Mon May 10 01:55:53 EST 2010 Disk Benchmark...
Mon May 10 01:55:51 EST 2010 Bonnie service has been started.
Sun May 9 23:54:32 EST 2010 The Bonnie Add-on has been successfully installed.
===1.96,1.96,ReadyNasPro,1,1273419028,2G,,760,88,20656,4,17189,4,734,55,147995,26,218.3,3,256,,,,,239,99,302797,99,21390,19,259,99,314931,99,325,49,9958us,2174ms,1951ms,1518ms,101ms,100ms,406ms,664us,432us,444ms,60us,4932ms
1.96,1.96,ReadyNasPro,1,1273419028,2G,,760,88,20656,4,17189,4,734,55,147995,26,218.3,3,256,,,,,239,99,302797,99,21390,19,259,99,314931,99,325,49,9958us,2174ms,1951ms,1518ms,101ms,100ms,406ms,664us,432us,444ms,60us,4932ms===
4092528+0 records in
4092528+0 records out
2095374336 bytes (2.1 GB) copied, 22.909 seconds, 91.5 MB/s
I also think I need DD results for each individual HDD, to help pin down a single drive or highlight that its all of them.
Can someone else who has these HDD's please give this add-on a try. The add-on does not require any changes to SSH.
After it has finished running.... Maybe 1hr unit the Status Log states the Speed and test completed.
The results will be in a folder called benchmark in the ReadyNasPro which can be accessed via command prompt running ofnet use P: \\ip-of-readynas\c /user:admin
and then going to P: Drive on My Computer.
Once you have copied the benchmark folder out to desktop remember to right click on P: drive and Disconnect the Mapped network Drive. Version 1.96 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
nas-05 8G 302 99 212202 71 107321 26 1302 99 277330 34 942.3 24
Latency 29253us 152ms 145ms 18990us 41966us 394ms
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
nas-05 256 25163 74 253426 99 19293 48 28168 81 325141 99 8949 23
Latency 177ms 887us 369ms 120ms 75us 1072ms
16146896+0 records in
16146896+0 records out
8267210752 bytes (8.3 GB) copied, 59.0743 seconds, 140 MB/s
2 - 8G - 8073448
System tested at 72% used capacity with 9 iSCSI LUNs (0% fragmentation), 4 LUNs in light to moderate use by MS SQL databases.
Judging by the file timestamps, it appears Bonne++ took about 6 minutes to run:
-rwxrwxrwx 1 nobody nogroup 2 2010-05-12 11:11 coef.txt
-rw-r--r-- 1 nobody nogroup 105 2010-05-12 11:17 DD_result.txt
drwxr-xr-x 4 nobody nogroup 4096 2010-05-12 11:15 previous
-rw-r--r-- 1 nobody nogroup 3412 2010-05-12 11:15 Result.html
-rw-r--r-- 1 nobody nogroup 801 2010-05-12 11:15 Result.txt
drwxrwxrwx 2 nobody nogroup 4096 2010-05-12 11:15 tmp
-rw-r--r-- 1 nobody nogroup 17 2010-05-12 11:11 variables.txt
ReadyNAS Pro Business
4 GB RAM
6x 300 GB WD Velociraptors
RAID Level X-RAID2, 6 disks
Status: Redundant
1001 GB (72%) of 1371 GB used
No space allocated for snapshots
RAID Disks:
Ch 1 : WDC WD3000HLFS-01G6U0 [279 GB] 274 GB allocated
Ch 2 : WDC WD3000HLFS-01G6U1 [279 GB] 274 GB allocated
Ch 3 : WDC WD3000HLFS-01G6U0 [279 GB] 274 GB allocated
Ch 4 : WDC WD3000HLFS-01G6U0 [279 GB] 274 GB allocated
Ch 5 : WDC WD3000HLFS-01G6U0 [279 GB] 274 GB allocated
Ch 6 : WDC WD3000HLFS-01G6U0 [279 GB] 274 GB allocated- @emonkia ... Very Nice speed.
Mine is not .... 20,656 vs 212,202 ..... That is 1/10 or should I say 10% the speed of yours ... Im saying it looks to be down to the HDD's Only so its the WD..EARS vs WD VelociRaptor...... and 4KB cluster straddling 2 physical sectors.... i.e. 4KB Alignment problem.
Just To Make It Easier On The Eyes To Compare.
Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
WD20EARS 2G 760 88 20656 4 17189 4 734 55 147995 26 218.3 3
WD3000HLFS 8G 302 99 212202 71 107321 26 1302 99 277330 34 942.3 24
Latency **Note Milli Seconds vs Micro Seconds**
WD20EARS 9958us 2174ms 1951ms 1518**ms** 101**ms** 100ms
WD3000HLFS 29253us 152ms 145ms 18990**us** 41966**us** 394ms
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
WD20EARS 256 239 99 302797 99 21390 19 259 99 314931 99 325 49
WD3000HLFS 256 25163 74 253426 99 19293 48 28168 81 325141 99 8949 23
Latency **Note Milli Seconds vs Micro Seconds**
WD20EARS 406ms 664us 432**us** 444ms 60us 4932ms
WD3000HLFS 177ms 887us 369**ms** 120ms 75us 1072ms
Please Read this article about the new "Advanced Format" 4KB Block sector / cluster Overlap / mis-aligned Data.
In a nutshell, it’s replacing the traditional 512 byte hard drive sector with a 4 kilobyte (4,096B) hard drive sector for a number of practical and technological reasons.
http://www.anandtech.com/show/2888 ... Read from the start to finish and you will understand how this will eventually effect everyone and all brands as HDD sizes grow past 2TB.
There are benefits such as better error correction not to mention the size increase..
This will most likely be addressed under Yoh-Dah's areas of Firmware updates not by c3po's.c3po wrote: (Shortened quote) Hi MrCyberdude,
To address the complaints on HDD:
(1) The regulatory and safety tests are lengthy, because of this, WDC tends to change hardware and firmware without changing product model name and model number(Very bad practice) - We have been caught by this many times.
The very latest one is 4KB physical sector. Somehow, ReadyNAS is not 4KB aligned(We take part of blame on this because we should have used 4KB boundary).
Because of this, each write will split into two writes (WDC has to read/modify/write with correct ECC to half updated physical sector),
write performance hit is over 50% because of this. New release will of course address this problem
(2) Disk test. We have integrated disk test into boot menu for a while now. To access boot menu, please follow the user manual (I am not sure if this is actually documented for each product, but I am sure you can get answer for each ReadyNAS on forum)
(3) Rather than this 4K performance issue, and above disk test, I don't see any other case that we can blame HDD for performance issue
Best regards, c3po
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