Instructions for LVM?

Lennart Sorensen lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org
Wed Jan 4 22:45:17 UTC 2006


On Wed, Jan 04, 2006 at 06:38:18PM -0400, Tony Abou-Assaleh wrote:
> Why not? Performance related or fault-tolerance related? The physical
> properties of the case that I have make it very difficult to setup
> otherwise. The new cable that they make have a short distance between the
> master and slave heads, not long enough for my devices. The older and
> longer cables don't seem to work with the new HDDs.

If an ide device fails, it will often take down the bus at the same
time.  This is very different from how a scsi bus reacts.

So if you want the raid to be reliable during drive failures, you nver
put more than one drive in a raid per IDE cable.

Performance wise, IDE also tends to be much slower when devices share
the connector.  Disks don't disconnect and let the bus send other
commands while a transfer is being retrieved.

Len Sorensen
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