On Monday April 24, anssi.hannula@xxxxxxxxx wrote: > # mdadm --grow /dev/md_d1 --raid-devices=3 --backup-file backupfile > mdadm: Need to backup 128K of critical section.. > mdadm: /dev/md_d1: Cannot get array details from sysfs > > Strace shows that it's trying to access > "/sys/block/md_d4/md/component_size". > > Why is this? Because I didn't test my code properly :-( Following patch should fix it. Re: the recovery speed problem: I would try dding from one drive to the other and see what sort of speed you get then: dd if=/dev/sda of=/dev/sdb bs=1024k count=1000 or something like that. Thanks, NeilBrown Signed-off-by: Neil Brown <neilb@xxxxxxx> ### Diffstat output ./sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff ./sysfs.c~current~ ./sysfs.c --- ./sysfs.c~current~ 2006-03-14 15:33:12.000000000 +1100 +++ ./sysfs.c 2006-04-24 07:56:56.000000000 +1000 @@ -206,7 +206,7 @@ unsigned long long get_component_size(in minor(stb.st_rdev)); else sprintf(fname, "/sys/block/md_d%d/md/component_size", - minor(stb.st_rdev)/16); + minor(stb.st_rdev)/64); fd = open(fname, O_RDONLY); if (fd < 0) return 0; - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
