David Lethe wrote:
the disk manufacturers stopped making them last year, and stopped R&D on them way before that.
-----Original Message-----
From: "Keith Roberts" <keith@xxxxxxxxxxxx>
Subj: RE: Re: Re: Two Drive Failure on RAID-5
Date: Tue May 20, 2008 5:20 pm
Size: 1K
To: "linux-raid@xxxxxxxxxxxxxxx" <linux-raid@xxxxxxxxxxxxxxx>
On Tue, 20 May 2008, David Lethe wrote:
To: Cry <cry_regarder@xxxxxxxxx>, linux-raid@xxxxxxxxxxxxxxx
From: David Lethe <david@xxxxxxxxxxxx>
Subject: RE: Re: Re: Two Drive Failure on RAID-5
Here is a good analogy that puts this in perspective. I haven't seen
anybody equate the two yet, so get the name right if you quote this ;)
Disk drives are like light bulbs. You can buy the server class (similar
to CFLs), or desktop (incandescent). If you don't mind the dark,
replace them as they fail, and buy spares as they go on sale.
Conversely, if you have to maintain a vaulted ceiling chandelier, and
are afraid of heights, then spending twice as much for never having to
deal with *THAT* again will seem like a bargain.
- David Lethe
So are there such things as server class EIDE drives? Or are
they all SCSI or SATA?
Keith
Different vendors have different strategies around how to market their
various drives - you have archival (think big, slow S-ATA for things
like a Tivo), S-ATA drives that are consumer grade or slightly higher
class drive like SAS (serial attached SCSI) and then the highest quality
drives (Fibre channel).
You can get good results from all classes of drives, but you need to
make sure that you periodically check them pro-actively for errors and
try to repair them in place if possible. Also, make sure you get an
updated kernel so we don't kick out drives that would be otherwise
perfectly reasonable ;-)
ric
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