[Qemu-devel] scsi-hd with discard_granularity and unmap results in Aborted Commands

[Stefan Priebe - Profihost AG]

Hello list,

i wantes to use scsi unmap with rbd. rbd documention says you need to 
set discard_granularity=512 for the device. I'm using qemu 1.2.

If i set this and send an UNMAP command i get this kernel output:

Sense Key : Aborted Command [current]
sd 2:0:0:1: [sdb]
Add. Sense: I/O process terminated
sd 2:0:0:1: [sdb] CDB:
Write same(16): 93 08 00 00 00 00 00 00 00 00 00 7f ff ff 00 00
end_request: I/O error, dev sdb, sector 0
sd 2:0:0:1: [sdb]
Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 2:0:0:1: [sdb]
Sense Key : Aborted Command [current]
sd 2:0:0:1: [sdb]
Add. Sense: I/O process terminated
sd 2:0:0:1: [sdb] CDB:
Write same(16): 93 08 00 00 00 00 01 ff ff fc 00 7f ff ff 00 00
end_request: I/O error, dev sdb, sector 33554428
sd 2:0:0:1: [sdb]
Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 2:0:0:1: [sdb]
Sense Key : Aborted Command [current]
sd 2:0:0:1: [sdb]
Add. Sense: I/O process terminated
sd 2:0:0:1: [sdb] CDB:
Write same(16): 93 08 00 00 00 00 00 ff ff fe 00 7f ff ff 00 00
end_request: I/O error, dev sdb, sector 16777214

Greets,
Stefan