On 9/25/2011 9:28 AM, Marcin M. Jessa wrote:
On 9/25/11 1:43 PM, Stan Hoeppner wrote:
[...]
When you have a problem such as yours, and you ask for help on this, or
any other Linux kernel list, it's a really good idea to post all of the
relevant information up front. Why? Because most often when drives drop
out of arrays it is not because a disk failed or the disk has buggy
firmware. It's most often because of problems elsewhere in the storage
stack, either hardware or software.
I wasn't sure which information I should attach and I did not want to
spam the list. I was hoping someone would tell me if some of the
relevant information was missing so I could send it when needed.
Could you please tell me what kind of data was missing?
Crappy HBAs and/or drivers, loose or dislodged cable connectors, and
crappy active/passive backplanes are the primary movers when it comes to
good drives dropping out of arrays.
In my case I don't use any HW Raid.
My motherboard is a MSI 870A-G54 -
http://www.msi.com/product/mb/870A-G54.html and I only use SATA and
software RAID.
Again, I implore you to investigate all other portions of your storage
stack before blowing money on drives, which may not be the cause of your
problem.
It's really hard to find the source of the failure.
My first assumption was the drives, since I have 5 more (different) HDs
connected to the board, two in RAID 1 (ATA drives) and they all work
flawlessly.
Reading feedbacks from all the people complaining about the same issue
with the SEAGATE drives as I have I automatically assumed there is a
problems with these particular disks.
Are the drives screwed into the case's internal drive cage? Directly
connected to the motherboard SATA ports with cables? Or, do you have
the drives mounted in any kind of SATA hot/cold swap cage? The cheap
ones of these are notorious for causing exactly the kind of drop outs
you've experienced. Post a link to your case and any drive related
peripherals.
Did you suffer a power event? I.e. a sag, brown out? Is the system
connected to a good quality working UPS?
Something else you should always mention: How long did it all "just
work" before having problems? A few hours? Days? Weeks? Months? Had
you made any hardware changes to the system recently before the failure
event? If so what? Did you upgrade your kernel/drivers recently, or
any software in the storage stack? Is the PSU flaky? How old is it? A
flaky PSU can drop drives out of arrays like hot potatoes when there is
heavy access and thus heavy current draw.
--
Stan
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