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Has anyone had WDC WD20EADS-00R6B0 re-enable TLER on its own
I just found the weirdest thing and now I am concerned about the longevity of my disks.
System: ReadyNas PRO Business Edition
I bought 7 - 2TB WDC WD20EADS-00R6B0 disks about 1.5 years ago (one as a spare in case I need to RMA so I don't go unprotected). I ran the TLER-OFF progam on all of them and confirmed it with TLERSCAN. These disk have been running just fine for the past year or so with minimal Load Cycle Count (<1000) for the entire length of the drive life.
I just checked today (on a total whim) and found this:
Model: WDC WD20EADS-00R6B0
Serial: WD-WCAVY1366927
Firmware: 01.00A01
SMART Attribute
Raw Read Error Rate 0
Spin Up Time 9908
Start Stop Count 45
Reallocated Sector Count 0
Seek Error Rate 0
Power On Hours 13177
Spin Retry Count 0
Calibration Retry Count 0
Power Cycle Count 44
Power-Off Retract Count 16
Load Cycle Count 268310
Temperature Celsius 38
Reallocated Event Count 0
Current Pending Sector 0
Offline Uncorrectable 0
UDMA CRC Error Count 0
Multi Zone Error Rate 0
OMG!!!
I pulled all of the disks and booted them and a TLERSCAN showed that every disks TLER was turned back on and set to 7s. I manually turned it off and confirmed, but now I am concerned.
The only changes to the system which have occured on the past 3-4 months are:
-standard firmware upgrades (was running 4.2.15 up until this morning)
-I was having a problem a few months back where the whole NAS was freezing up which lead me to a lot of troubleshooting changes (ended up being a ext3 volume on a external USB disk which needed to be repaired). During the troubleshooting I:
- upgraded the memory to 4GB of 2-2GB sticks of same brand (thought the 1GB + 2Gb from Aegis may have been suspect - no effect)
- completely backed up and re-built the whole drive array ( i had been wanting this anyway to upgrade from ext3 to ext4 for future disk upgrades)
The changes didn't resolve the issue (which as noted ended up being the USB disk) but do you think it's possible that Default Reset to the ReadyNAS could have re-enabled the TLER somehow?
Thanks in advance for any help.
System: ReadyNas PRO Business Edition
I bought 7 - 2TB WDC WD20EADS-00R6B0 disks about 1.5 years ago (one as a spare in case I need to RMA so I don't go unprotected). I ran the TLER-OFF progam on all of them and confirmed it with TLERSCAN. These disk have been running just fine for the past year or so with minimal Load Cycle Count (<1000) for the entire length of the drive life.
I just checked today (on a total whim) and found this:
Model: WDC WD20EADS-00R6B0
Serial: WD-WCAVY1366927
Firmware: 01.00A01
SMART Attribute
Raw Read Error Rate 0
Spin Up Time 9908
Start Stop Count 45
Reallocated Sector Count 0
Seek Error Rate 0
Power On Hours 13177
Spin Retry Count 0
Calibration Retry Count 0
Power Cycle Count 44
Power-Off Retract Count 16
Load Cycle Count 268310
Temperature Celsius 38
Reallocated Event Count 0
Current Pending Sector 0
Offline Uncorrectable 0
UDMA CRC Error Count 0
Multi Zone Error Rate 0
OMG!!!
I pulled all of the disks and booted them and a TLERSCAN showed that every disks TLER was turned back on and set to 7s. I manually turned it off and confirmed, but now I am concerned.
The only changes to the system which have occured on the past 3-4 months are:
-standard firmware upgrades (was running 4.2.15 up until this morning)
-I was having a problem a few months back where the whole NAS was freezing up which lead me to a lot of troubleshooting changes (ended up being a ext3 volume on a external USB disk which needed to be repaired). During the troubleshooting I:
- upgraded the memory to 4GB of 2-2GB sticks of same brand (thought the 1GB + 2Gb from Aegis may have been suspect - no effect)
- completely backed up and re-built the whole drive array ( i had been wanting this anyway to upgrade from ext3 to ext4 for future disk upgrades)
The changes didn't resolve the issue (which as noted ended up being the USB disk) but do you think it's possible that Default Reset to the ReadyNAS could have re-enabled the TLER somehow?
Thanks in advance for any help.
2 Replies
Replies have been turned off for this discussion
- IIRC TLER (Time-Limited Error Recovery) has nothing to do with Load Cycle Count.
The value you want to change is the head parking timer (WD calls this "idle3") wich is set with wdidle3 (http://support.wdc.com/product/download.asp?groupid=609&sid=113).
Changing this from the default 8s to 300s will lower the count from up to 1000 per day to about 20.
Now im not sure if 300 is the ideal value.
Its a power saving feature afterall. - Not sure if the same steps are applicable but I just disabled the idle3 timer (which I believe is responsible for the high LCC) directly from my ReadyNAS Ultra 4 box:
http://www.readynas.com/forum/viewtopic.php?f=11&t=59700
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