I did a /dev/MAKEDEV md and it seemed to create lots of /dev/md* devices :
/dev/md0 /dev/md17 /dev/md25 /dev/md5 /dev/mdsp13 /dev/mdsp7
/dev/md1 /dev/md18 /dev/md26 /dev/md6 /dev/mdsp14 /dev/mdsp8
/dev/md10 /dev/md19 /dev/md27 /dev/md7 /dev/mdsp15 /dev/mdsp9
/dev/md11 /dev/md2 /dev/md28 /dev/md8 /dev/mdsp16 /dev/mdspstat
/dev/md12 /dev/md20 /dev/md29 /dev/md9 /dev/mdsp2
/dev/md13 /dev/md21 /dev/md3 /dev/mdsp1 /dev/mdsp3
/dev/md14 /dev/md22 /dev/md30 /dev/mdsp10 /dev/mdsp4
/dev/md15 /dev/md23 /dev/md31 /dev/mdsp11 /dev/mdsp5
/dev/md16 /dev/md24 /dev/md4 /dev/mdsp12 /dev/mdsp6
/dev/md0 was already defined (I'm using it), but I don't have a /dev/md/
directory....perhaps that is a difference between Gentoo and FC4 (what
I'm using)...
hth
Max.
Robert Washburne wrote:
I am setting up a file server using Gentoo 2005.1, kernel 2.6.14-r2
The installed system creates eight RAID devices - /dev/md[0-7], /dev/md/[0-7]
I wish to create nine RAIDs, so I used "mknod /dev/md/8 b 9 8" to create another
device (and its associated link, /dev/md8).
The hardware consists of a 650 MHz AMD Duron with 1 GB ram. Four WD 250 GB IDE
drives are connected to the four IDE busses of two Promise Technologies IDE
ATA100 controlers. The drives are all partitioned the same using partitions
[1-3, 5-12].
I used raidtools to define and create the RAIDs.
The first eight devices created and synced with no problem (seven RAID5 and one
RAID0). But when I created the ninth RAID5, it got about 30% through the sync
and then the system hung. Keyboard was dead. I had to power-cycle.
The the system came back up, it continued to sync, but hung again after a minute
or two.
Is there a hard limit of only eight RAID devices?
If so, can this limit be readily increased?
If need be, I can repartition my drives and reduce the RAIDs to only eight, but
I would prefer to keep the nine, if possible.
Thanks in advance!
Bob W.
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