Re: Using Alioth Opteron net install to config MD raid1
On Thu, May 19, 2005 at 05:15:34PM -0500, Adam Majer wrote:
> Not true. It depends on the type of disk failure. Most of the disk
> failures that I've had dealt with the drive grinding to a halt or some
> other mechanical thingy in the drive breaking. Software raid detects
> that (cannot read drive) and kicks the drive out. The admin can then
> spin down the drive, etc.. (hdparm).
>
> Modern IDE drives are quite good at detecting their own failures.
> Virtually all have S.M.A.R.T. just like SCSI. Of course, SCSI is still
> more reliable than IDE :)
I agree with most of that. As for scsi being more reliable, I won't
agree at all. Too many IBM scsi disks dying on me for that to be the
case.
As long as you NEVER run two ide drives on one cable, they tend to
survive disk failures very well when using raid. If swap is NOT on raid
however the system will fall over in horrible ways when it can't
read/write that part of swap anymore.
Not having swap on raid is just insane if any part of the system is
running raid.
Len Sorensen
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