> I didn't try 4 drives. 19MB/s doesn't sound too impressive for 4
> drives at raid5.
>
> How are you measuring the performance?
> I've found that reading /dev/md0 is quite a bit slower
> than reading a file on a mounted filesystem on /dev/md0.
Well, true, I got 19MB/s when I did a "hdparm -t /dev/md0". When I did a
"cp [one gig file] /dev/null" I got 21 MB/s, but I'm not sure how reliable
that kind of test is, seeing how it gave me 18.5 MB/s when I did the same
thing with a 250MB file.
Each drive is divided into three partitions:
hdx1 = 250MB (only used on the first disk to access file system stuff)
hdx2 = 64MB swap (rarely used)
hdx3 = 19,800MB type "fd" (for persistent superblock)
I have my drives mounted as:
hda1 /
hda2 swap
hdc2 swap
hde2 swap
hdg2 swap
md0:hda3,hdc3,hde3,hdg3 /home
Is there a problem with partitioning my drives like this? dedicate the
whole disk to RAID if I only know how to boot from it (rather than a boot
floppy, this seems rather clunky to me). Any suggestions?
Thanks
-ck
