Replace older drives on a RAID5.

Previously Wilson <opm1 DeleteThis @yahoo.com> wrote:
 > We have an email server running a RAID5 (Hot Swap) storage setup with
 > an Adaptec 2100s SCSI controller. Currently we have 4 older IBM 18GB
 > 80pin drives installed. 1 drive is setup as the "Hot Spare". One of
 > the drives just recently malfunctioned, and we would like to replace
 > this drive with a newer drive. We would also like to slowly replace
 > the other 3 older IBM drives with newer drives.

 > Is this possible, or do we have to locate the exact same drive to
 > replace the malfunctioned drive?

Usually the replacement has to be the same size or lager. Be careful
that the size must match exactly (number of secors) or be larger.

In addition most SCSI-variants are compatible with each other with
the use ow an adapter.

 > If it is possible, what is your recommendation on a drive to use.

If it is not possible, replace the whole set-up. In that case you have
been riped up. Make sure to get a spare controller as well, since
the controller cannot usually be replaced with anything but the same
model.

On the drive model, you have to take into account, that when replacing
a disk in an existing RAID-5 array, you cannot use any extra capacity.

My advice would be to replace the whole set-up with 2 36GB HDDs
in a RAID-1 configuration or three of them if you still want
a hot spare.

Arno
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 >> Stay informed about: Replace older drives on a RAID5. 

"Arno Wagner" <me.DeleteThis@privacy.net> wrote in message news:2h2j25F85gdaU1@uni-berlin.de...
 > Previously Wilson <opm1.DeleteThis@yahoo.com> wrote:
  > > We have an email server running a RAID5 (Hot Swap) storage setup with
  > > an Adaptec 2100s SCSI controller. Currently we have 4 older IBM 18GB
  > > 80pin drives installed. 1 drive is setup as the "Hot Spare". One of
  > > the drives just recently malfunctioned, and we would like to replace
  > > this drive with a newer drive. We would also like to slowly replace
  > > the other 3 older IBM drives with newer drives.
 >
  > > Is this possible, or do we have to locate the exact same drive to
  > > replace the malfunctioned drive?
 >
 > Usually the replacement has to be the same size or lager.

I prefer bitter.

 > Be careful that the size must match exactly (number of secors) or be larger.

Yes, you said that already. Too much lager?

 >
 > In addition most SCSI-variants are compatible with each other with
 > the use ow an adapter.

Clueless.

 >
  > > If it is possible, what is your recommendation on a drive to use.
 >
 > If it is not possible, replace the whole set-up. In that case you have
 > been riped up. Make sure to get a spare controller as well, since the
 > controller cannot usually be replaced with anything but the same model.
 >
 > On the drive model, you have to take into account, that when replacing
 > a disk in an existing RAID-5 array, you cannot use any extra capacity.
 >
 > My advice would be to replace the whole set-up with 2 36GB HDDs in
 > a RAID-1 configuration or three of them if you still want a hot spare.
 >
 > Arno<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Replace older drives on a RAID5. 

On Thu, 20 May 2004 15:24:48 +0200, "Folkert Rienstra"
<see_reply-to DeleteThis @myweb.nl> wrote:

 >I prefer bitter.

We agree on that.


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One should rather skid in broadside, thoroughly used up,
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 >> Stay informed about: Replace older drives on a RAID5. 

"Folkert Rienstra" <see_reply-to DeleteThis @myweb.nl> wrote:

 >"Arno Wagner" <me DeleteThis @privacy.net> wrote:
  >>
  >> Usually the replacement has to be the same size or lager.
 >
 >I prefer bitter.
 >
  >> Be careful that the size must match exactly (number of secors) or be larger.
 >
 >Yes, you said that already. Too much lager?
 >
  >> In addition most SCSI-variants are compatible with each other with
  >> the use ow an adapter.
 >
 >Clueless.

Now that's comedy. <!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Replace older drives on a RAID5.