On Fri, 5 Dec 2008, Redeeman wrote:
On Fri, 2008-12-05 at 16:12 -0500, Justin Piszcz wrote:
On Fri, 5 Dec 2008, Redeeman wrote:
On Fri, 2008-12-05 at 16:01 -0500, Justin Piszcz wrote:
On Fri, 5 Dec 2008, Redeeman wrote:
I thought disks had this internally, and could be prompted to do it by
writing to the sector?
Yes-- and that is what I did over and over again, dd if=/dev/zero of=/dev/dsk
it ran OK for 1-2 days but then it started erroring again with Velociraptors.
With some old 400GiB Seagates, I did the same thing and their pending sector
list rose but the drives still remained working for 1-2 years after. The
problems I mention are only applicable to my latest experience with
velociraptor hdds.
typically, (having run md/linux) for a number of years is not
super-necessary if you run checks on your disks once a week *AND* you have
good drives that don't have problems.
Obviously i intent to replace broken disks as i detect them, but as i
understand it, its fairly common case that disks will get bad sectors
over time, and remap them internally?
Yes, and with 'check' I believe it helps to ensure this process (it is like
'scrubbing') using RAID VERIFY in the 3ware controller.
Justin.
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