Software RAID + XFS question

[Federico Voges]

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Hi,

Anyone using software RAID (mirroring) on an all XFS system???

I've installed kernel 2.4.18 + XFS on a COL 3.1.1 and moved all the
partitions to XFS except for /boot (ext3). The LILO README says
something about soft RAID devices and XFS but I can't figure how it
out.

It's not a problem to have /boot use ext3 but I'd like to use only XFS.

Another question: if I use install=/dev/md0 (/boot) in /etc/lilo.conf
and the primary disk fails (and I remove it), the system should boot
from the second disk, right??

Finally, I've partitioned the disk like this:
md0 50MB   /boot   (ext3)
md1 7GB    /       (xfs)
md2 512MB          (swap)
md3 22GB   /home   (xfs)

Any sugestions about this partitioning scheme?? Acording to hdparm
tests, /dev/md2 is faster than the others (I guess that's because it's
located near the middle of the disk):

[root at benito ~]# hdparm -tT /dev/md[0-3]

/dev/md0:
 Timing buffer-cache reads:   128 MB in  0.90 seconds =142.22 MB/sec
 Timing buffered disk reads:  read() failed: Success   

/dev/md1:
 Timing buffer-cache reads:   128 MB in  0.90 seconds =142.22 MB/sec
 Timing buffered disk reads:  64 MB in  3.99 seconds = 16.04 MB/sec

/dev/md2:
 Timing buffer-cache reads:   128 MB in  0.89 seconds =143.82 MB/sec
 Timing buffered disk reads:  64 MB in  2.24 seconds = 28.57 MB/sec

/dev/md3:
 Timing buffer-cache reads:   128 MB in  0.89 seconds =143.82 MB/sec
 Timing buffered disk reads:  64 MB in  3.29 seconds = 19.45 MB/sec

Oh, as the size of md0 is 50MB, I assume the error is because hdparm is
trying to read 64MB, am I right?

TIA

Net Llama: you're right about XFS: it rocks! It's really fast. I've
deleted a whole directory with 550MB of files and it was like deleting
a small file: instant deletion. It has also survived several system
resets while writting to files without trouble.
Federico Voges
Socio gerente

Intrasoft
Malabia 2137 14 A
(1425) Buenos Aires
Argentina

Te/Fax: 54-11-4833-5182
e-mail: fvoges at intrasoft.com.ar
Web: http://www.intrasoft.com.ar

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