Upgrading to kernel 2.6.16-2088 and I'm getting the following error when booting. device-mapper: dm-stripe: Target length not divisible by chunk size. device-mapper: error adding target to table. There was a patch submitted to 2.6.16, that limits dm-stripe to targets that are multiples of the chunk size. [PATCH] dm stripe: Fix bounds The dm-stripe target currently does not enforce that the size of a stripe device be a multiple of the chunk-size. Under certain conditions, this can lead to I/O requests going off the end of an underlying device. This test-case shows one example. echo "0 100 linear /dev/hdb1 0" | dmsetup create linear0 echo "0 100 linear /dev/hdb1 100" | dmsetup create linear1 echo "0 200 striped 2 32 /dev/mapper/linear0 0 /dev/mapper/linear1 0" | \ dmsetup create stripe0 dd if=/dev/zero of=/dev/mapper/stripe0 bs=1k This will produce the output: dd: writing '/dev/mapper/stripe0': Input/output error 97+0 records in 96+0 records out And in the kernel log will be: attempt to access beyond end of device dm-0: rw=0, want=104, limit=100 The patch will check that the table size is a multiple of the stripe chunk-size when the table is created, which will prevent the above striped device from being created. This should not affect tools like LVM or EVMS, since in all the cases I can think of, striped devices are always created with the sizes being a multiple of the chunk-size. The size of a stripe device must be a multiple of its chunk-size. (akpm: that typecast is quite gratuitous) Signed-off-by: Kevin Corry <kevcorry@xxxxxxxxxx> Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxx> I have tried setting the bios chunck size to 64, 32, 16k and re-installed from the DVD. I used both FC5T3 and FC5 install DVD. I have tried 8 times with re-installs. It would seem that a computer with dm-stripe can not be further upgraded because of the patch which was submitted to 2.6.16 kernel. The patch is perfectly good, to fix a problem. How do you fix the stripe so it is a multiple of chunk-size? If we can not fix it manually, we should notify people not to use dmraid with Bios software raid. I'm going to submit a bug report for this. dmsetup status via_ecfdfiehfa: 0 312499998 striped VolGroup00-LogVol01: 0 4063232 linear VolGroup00-LogVol00: 0 308150272 linear via_ecfdfiehfap2: 0 312287535 linear via_ecfdfiehfap1: 0 208782 linear *** Active Set name : via_ecfdfiehfa size : 312499998 stride : 128 type : stripe status : ok subsets: 0 devs : 2 spares : 0 -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list