NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Defrag - Find out how long?
Being new to ReadyNAS there were various things I wanted to know.
One of these was about the Defrag process and how long it takes to run.
Having trawled through the forums, one thing is apparent. Think carefully before carrying out a Defrag.
It can take several hours or even several days on low performance systems. At it's worst, it can cause significant problems on a ReadyNAS system, especially if that system has very little free space, and Defrag has not been done before.
The amount of time depends on how much data is used and also the capacity of the system, and whether you have snapshots and bitrot protection turned on. This is all covered elsewhere.
It is NOT my intention to describe how Defrag works, but one thing I did discover was that Defrag can consume free space on disks. http://www.readynas.com/forum/viewtopic.php?f=11&t=79875#p451167.
I have now done two Defrags and intend to do them manually every few weeks, maybe months.
The data below MAY be useful to new persons such as myself and help people with their expectations.
So I suggest that those who are interested post their information in this post.
System ..... OS ....... RAID .... Disks ......... Total ........ Used ......... Defrag time ..... Comments
RN516 ...... 6.2.2 .... 10 ....... 6 of 4 TB .... 10.90 TiB ... 1.59 TiB ..... 3 to 12 Mins .... With daily snapshots.
RN516 ...... 6.2.2 .... 10 ....... 6 of 4 TB .... 10.90 TiB ... 1.66 TiB ..... 14 Mins .......... With daily snapshots.
RN314 ...... 6.2.2 ..... 1 ....... 2 of 4 TB ...... 3.63 TiB ... 2.09 TiB ..... 4 Mins ........... With daily snapshots.
RN312 ...... 6.2.2 ..... 1 ....... 2 of 2 TB ....... 1.8 TiB ... 1.00 TiB ..... 8 Mins ............ Without daily snapshots, and first time ever defrag for a home system (8,800 power on hours).
Pro-6 ....... 6.2.3 ..... 5 ....... 3 of 3 TB ...... 5.45 TiB ... 2.03 TiB ..... 82 Mins .......... T1773, with snapshots - 1st run.
Pro-6 ....... 6.2.3 ..... 5 ....... 3 of 3 TB ...... 5.45 TiB ... 2.14 TiB ..... 55 Mins .......... T1773, with snapshots - 2nd run.
RN516 ...... 6.2.2 ..... 6 ....... 6 of 2 TB ...... 7.68 TiB ....????? TiB ..... 6 Mins ........... WD Red disks. Not used much. Run 1 year with 1 previous defrag.
PLEASE ADD YOUR DATA TO THIS POST especially if you have a different system or RAID setup.
I believe that a lot of ReadyNAS users have carried out Defrag, and mostly taking far more time than a few minutes.
I am lucky (currently) that my system is at 15% capacity only.
IMHO it is unwise to wait until your system is near full capacity and then do a Defrag.
Please note I am not a ReadyNAS expert, just a Newbie wishing to collate information for the good of all.
One of these was about the Defrag process and how long it takes to run.
Having trawled through the forums, one thing is apparent. Think carefully before carrying out a Defrag.
It can take several hours or even several days on low performance systems. At it's worst, it can cause significant problems on a ReadyNAS system, especially if that system has very little free space, and Defrag has not been done before.
The amount of time depends on how much data is used and also the capacity of the system, and whether you have snapshots and bitrot protection turned on. This is all covered elsewhere.
It is NOT my intention to describe how Defrag works, but one thing I did discover was that Defrag can consume free space on disks. http://www.readynas.com/forum/viewtopic.php?f=11&t=79875#p451167.
I have now done two Defrags and intend to do them manually every few weeks, maybe months.
The data below MAY be useful to new persons such as myself and help people with their expectations.
So I suggest that those who are interested post their information in this post.
System ..... OS ....... RAID .... Disks ......... Total ........ Used ......... Defrag time ..... Comments
RN516 ...... 6.2.2 .... 10 ....... 6 of 4 TB .... 10.90 TiB ... 1.59 TiB ..... 3 to 12 Mins .... With daily snapshots.
RN516 ...... 6.2.2 .... 10 ....... 6 of 4 TB .... 10.90 TiB ... 1.66 TiB ..... 14 Mins .......... With daily snapshots.
RN314 ...... 6.2.2 ..... 1 ....... 2 of 4 TB ...... 3.63 TiB ... 2.09 TiB ..... 4 Mins ........... With daily snapshots.
RN312 ...... 6.2.2 ..... 1 ....... 2 of 2 TB ....... 1.8 TiB ... 1.00 TiB ..... 8 Mins ............ Without daily snapshots, and first time ever defrag for a home system (8,800 power on hours).
Pro-6 ....... 6.2.3 ..... 5 ....... 3 of 3 TB ...... 5.45 TiB ... 2.03 TiB ..... 82 Mins .......... T1773, with snapshots - 1st run.
Pro-6 ....... 6.2.3 ..... 5 ....... 3 of 3 TB ...... 5.45 TiB ... 2.14 TiB ..... 55 Mins .......... T1773, with snapshots - 2nd run.
RN516 ...... 6.2.2 ..... 6 ....... 6 of 2 TB ...... 7.68 TiB ....????? TiB ..... 6 Mins ........... WD Red disks. Not used much. Run 1 year with 1 previous defrag.
PLEASE ADD YOUR DATA TO THIS POST especially if you have a different system or RAID setup.
I believe that a lot of ReadyNAS users have carried out Defrag, and mostly taking far more time than a few minutes.
I am lucky (currently) that my system is at 15% capacity only.
IMHO it is unwise to wait until your system is near full capacity and then do a Defrag.
Please note I am not a ReadyNAS expert, just a Newbie wishing to collate information for the good of all.
21 Replies
Replies have been turned off for this discussion
- Almost a week has gone by with 77 views, and not one of you have any Defrag data that can be added? :( and :o
The data can be old as it would still be relevant to give an idea of what is achievable or realistic.
Please help provide reasonable expectations for those that have not yet carried out a Defrag.
PLEASE ADD YOUR DATA TO THIS POST - How long a defrag will take will vary depending on how much data is on the system and the nature of that data, what settings you use on your shares and what else you are doing with the system during that time.
- I agree, and hence the need to collect (even some limited data) on how long it will take.
When I started I had absolutely no idea how long a defrag would take, and now I know that it can be minutes or possibly be even days.
If we can possible provide evidence of when an incredibly long Defrag is likely, isn't it worth promulgating that info.
If only to provide reassurance to users so they do not do 'something stupid' like power off.
Surely knowledge is power :) - I'll bite!
System ..... OS ....... RAID .... Disks ......... Total ........ Used ......... Defrag time ..... Comments
RN314 ...... 6.2.2 .... 1 ....... 2 of 4 TB .... 3.63 TiB ... 2.09 TiB ..... 4 Mins .... With daily snapshots. - OK, I'll bite too...
System ..... OS ....... RAID .... Disks ......... Total ........ Used ......... Defrag time ..... Comments
RN312 ...... 6.2.2 .... 1 ....... 2 of 2 TB .... 1.8 TiB ...... 1.00 TiB ........ 8 Mins .......... Without daily snapshots, and first time ever defrag for a home system (8,800 power on hours).
I'm happy enough 8) - OK, slightly off topic, but I thought since I was dealing with system tools, I'd give the Scrub tool a go as well, even though I have never used it before. I'm not sure what other people get, but after two hours of 'Scrubbing', it has only achieved 0.75% of the task :shock: - is this 'normal' ? I power off my RN312 nightly, so I'm turning Scrub off until I get some feedback. BTW, the NAS has not been doing other tasks during these two hours, and nobody has accessed it.
- What do your disk SMART stats look like?
- Nothing of note - both disks (WD20EFRX) have zero errors, and run normally at less than 27 dgrees C. I did have a bit of a trawl around the Forum looking for Scrub times, and a RN104 was quoted as 1GB per hour, but I would expect my RN312 to better that....
JohnNulty wrote: OK, slightly off topic, but I thought since I was dealing with system tools, I'd give the Scrub tool a go as well, even though I have never used it before. I'm not sure what other people get, but after two hours of 'Scrubbing', it has only achieved 0.75% of the task :shock: - is this 'normal' ? I power off my RN312 nightly, so I'm turning Scrub off until I get some feedback. BTW, the NAS has not been doing other tasks during these two hours, and nobody has accessed it.
Please see http://www.readynas.com/forum/viewtopic.php?f=11&t=79865
My attempt to have this sort of data available :)- BaJohn, I support your intent, as metrics are something I consider important, but I am unlikley to be adding my data anytime soon to your scrub post. If my rig could potentially take 200 hours to complete a scrub job, I'm just going to leave well enough alone :?
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
