Looks like there is a panic (not system hang). any idea where is the panic log after the system has been power-recycled. (its not in the /var/log/messages or dmesg or /var/crash is empty) Thanks, Anand On 07/01/2011 05:25 PM, Anand Jain wrote:
hi, Following test case causes my remote system to hard-hang and does not respond to any key strokes. ----------- # btrfs fi show failed to read /dev/sr0 Label: none uuid: 75ad3c9f-f661-498e-8c13-89d4e4c58312 Total devices 3 FS bytes used 28.00KB devid 1 size 465.76GB used 2.02GB path /dev/sdb devid 3 size 465.76GB used 2.01GB path /dev/sdd devid 2 size 465.76GB used 1.01GB path /dev/sdc Btrfs v0.19-35-g1b444cd ------------ Stopping the disk ------------ # echo 1 > /sys/block/sdd/device/delete ------------ ------------ # dmesg | tail sd 3:0:0:0: [sdd] Stopping disk :: # ------------ ------------ # btrfs fi show failed to read /dev/sr0 Label: none uuid: 75ad3c9f-f661-498e-8c13-89d4e4c58312 Total devices 3 FS bytes used 28.00KB devid 1 size 465.76GB used 2.02GB path /dev/sdb devid 2 size 465.76GB used 1.01GB path /dev/sdc *** Some devices missing Btrfs v0.19-35-g1b444cd ------------ and the following command hangs the system. ------------- # btrfs fi balance /btrfs ------------- Any idea if this is an known issue ? OR if there is any better way to fail a disk (or a loop disk) for testing. (something similar to cfgadm -c unconfigure in solaris). Thanks -Anand
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