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seen Jul 7 at 17:51

Dec
31
revised How do I align my partition table properly?
edited body
Dec
31
answered How do I align my partition table properly?
Dec
31
comment Reasonable size for “filesystem reserved blocks” for non-OS disks?
Great, thanks. Straight from the horse's mouth, even :)
Dec
31
awarded  Scholar
Dec
31
accepted Reasonable size for “filesystem reserved blocks” for non-OS disks?
Dec
31
asked Reasonable size for “filesystem reserved blocks” for non-OS disks?
Dec
30
revised Improving mdadm RAID-6 write speed
added 7 characters in body
Dec
30
awarded  Commentator
Dec
30
comment How do you limit root partition disk access to allow drive to go into standby mode?
Parts of it is well described at lesswatts.org/tips/disks.php , see under headings "Use the '-' option in /etc/syslog.conf" and "hal cdrom polling"
Dec
30
comment Improving mdadm RAID-6 write speed
And for backups - I actually do have 4TB backups as a home user :) Spread over multiple external disks, a small NAS and the remaining computers in the house, but I have it. Not that the data are critical, but it took months to rip all my DVDs, and I'd rather not have to do it all over again :)
Dec
30
comment Improving mdadm RAID-6 write speed
Your original numbers aren't that far off what I would expect. With (almost) the same disks as you, I get 60MB/s write and 138 MB/s read in RAID 5. 3x90 MB/s writes is unrealistic (to the best of my knowledge), there's quite a bit overhead to software RAID writing.
Dec
30
awarded  Editor
Dec
30
revised Improving mdadm RAID-6 write speed
partial rewrite, cleanup
Dec
30
comment Improving mdadm RAID-6 write speed
I hope you have a data backup? When experimenting like this you may well end up having to rebuild the raid from scratch. Especially when tweaking stripe sizes and similar, it takes a complete rebuild to see the effect.
Dec
29
comment Improving mdadm RAID-6 write speed
BTW: Do you have AHCI enabled? Which file system - ext3, ext4?
Dec
29
comment Improving mdadm RAID-6 write speed
Try some other values, see what happens. Not an expert on this, but I have WD Greens (4x1.5TB) in md RAID 5 with the same issue - rather slow write speed. My system is down at the moment, but I'll experiment at my end as well, and update here if I manage to improve it.
Dec
29
answered Improving mdadm RAID-6 write speed
Dec
28
awarded  Teacher
Dec
28
answered How do you limit root partition disk access to allow drive to go into standby mode?
Dec
27
comment Recommended storage scheme for home server? (LVM/JBOD/RAID 5…)
BTW, there is also Greyhole, which manages a pool of drives somewhat like Windows Home Server.