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Re: Pulling disk out of the RAID 5 Array?

To: "Westerdale, John" <jwesterdale@xxxxxxxxxx>, linux-xfs@xxxxxxxxxxx
Subject: Re: Pulling disk out of the RAID 5 Array?
From: Seth Mos <knuffie@xxxxxxxxx>
Date: Tue, 18 Dec 2001 08:50:01 +0100
In-reply-to: <3156D872DCD0D411AF85000102C00AE602A70FE4@xxxxxxxxxxxxxxxxx t.com>
Sender: owner-linux-xfs@xxxxxxxxxxx
At 21:10 17-12-2001 -0500, Westerdale, John wrote:
Hello all!

Am tasked with proving the RAID-5 recovery strategy!

Have a Dual PII-400/ with external array (compaq storage F2) connected via
two ncr53C875 controllers... Box does OK! 8X9-GB drives provide 63 usable
GB, and has been behaving itself for the past week or so.

My Boss wants to pull out a drive, and put an unformatted one in and see how
it rebuilds!

raidhotadd /dev/md0 /dev/foo

Linux does not automatically asume the new disk should be used. If you have a spare disk you can define it as a hot-spare and it will automatically be used.

A realistic test for the dark day.... The external drive is all data. OS is
inside...
(does this matte?)

External or internal should not matter. Make sure you really do have a hot plug backplane.

Anything to watch out for when rebuilding is underway? Can I adjust
/etc/raidtab to rebuild faster?  How does XFS compare to rebuilds on other
file systems?!?!

Just as fast as any other system. The rebuild processs has not much to with the actual fs.

My last question was great!!! thanks for the responses... Seems the 2 GB
limit is in software settings and history more than programming techniques..
Cant we all just do > 2 GB ?

It normally should work but there are tools that still need some fixing.

Cheers

--
Seth
Every program has two purposes one for which
it was written and another for which it wasn't
I use the last kind.


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