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