Hi,
I've had my RAIDz volume working well on SNV_131 but it has come to my
attention that there has been some read issues with the drives. Previously I
thought this was a CIFS problem but I'm noticing that when transfering files or
uncompressing some fairly large 7z (1-2Gb) files (or even smaller rar -
200-300Mb) files occasionally running iostat will give the b% as 100 for a
drive or two.
I have the Western Digital EADS 1TB drives (Green ones) and not the more
expensive black or enterprise drives (our sysadmins fault).
The pool in question spans 4x 1TB drives.
What exactly does this mean? Is it a controller problem disk problem or cable
problem? I've got this on commodity hardware as its only used for a small
business with 4-5 staff accessing our media server. Its using the Intel ICHR
SATA controller. I've already changed the cables, swapped out the odd drive
that exhibted this issue and the only thing I can think of is to buy a Intel or
LSI SATA card.
The scrub sessions take almost a day and a half now (previously at most
12hours!) but theres also 70% of space being used (files wise they're chunky
MPG files) or compressed artwork but there are no errors reported.
Does anyone have any ideas?
Thanks
Em
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