%PDF-
%PDF-
Mini Shell
Mini Shell
# sg_unmap_example.txt
# This is an example of the contents of a file that can be given to sg_unmap
# For example, assume the /dev/sdc is a scratch disk (e.g. one made by the
# scsi_debug kernel module) then:
# sg_unmap --in=sg_unmap_example.txt /dev/sdc
0x12345677,1 # unmap LBA 0x12345677
0x12345678 2 # unmap LBA 0x12345678 and 0x12345679
0x12340000 3333 # unmap 3333 blocks starting at LBA 0x12340000
0X5a5a5a5a5a 0 # unmaps 0 blocks (i.e. does nothing)
a5a5a5h
7 # unmap 7 blocks starting at LBA 0xa5a5a5
# Note that there can be leading and trailing whitespace and whitespace
# (plus comma) can be a separator.
#
# Example invocation:
# $ sg_unmap --in=../examples/sg_unmap_example.txt -vv /dev/sdc
# open /dev/sg2 with flags=0x802
# unmap cdb: 42 00 00 00 00 00 00 00 58 00
# unmap parameter list:
# 00 56 00 50 00 00 00 00 00 00 00 00 12 34 56 77
# 00 00 00 01 00 00 00 00 00 00 00 00 12 34 56 78
# 00 00 00 02 00 00 00 00 00 00 00 00 12 34 00 00
# 00 00 0d 05 00 00 00 00 00 00 00 5a 5a 5a 5a 5a
# 00 00 00 00 00 00 00 00 00 00 00 00 00 a5 a5 a5
# 00 00 00 07 00 00 00 00
# sg_cmds_process_resp: slen=18
# unmap: Fixed format, current; Sense key: Illegal Request
# Additional sense: Invalid command operation code
# Raw sense data (in hex):
# 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00
# 00 00
# UNMAP not supported
#
# --------------------------------------------------------
# Notice the 8 byte header then 5 descriptors in the parameter
# list
Zerion Mini Shell 1.0