v1.12 exit code 5 on --get WCE command #2
Description
v1.10 and v1.12 yield the same output on similar hardware but exit code is different.
[root@xyz ~]# sdparm --version
version: 1.10 20160222 [svn: r279]
[root@xyz ~]# sdparm --get WCE /dev/sdy --verbose; echo "exit code" $?
mp_settings: page,subpage=0x8,0x0 num=1
[0x8,0x0] pdt=0 start_byte=0x2 start_bit=2 num_bits=1 val=0 acronym: WCE
/dev/sdy: ATA WDC WUH721818AL W233
WCE 1 [cha: y]
exit code 0
[root@abc ~]# sdparm --version
version: 1.12 20210421 [svn: r347]
[root@abc ~]# sdparm --get WCE /dev/sdy --verbose; echo "exit code" $?
mp_settings: page,subpage=0x8,0x0 num=1
[0x8,0x0] pdt=5120 start_byte=0x2 start_bit=2 num_bits=1 val=0 acronym: WCE
/dev/sdy: ATA WDC WUH721818AL W233
WCE 1 [cha: y]
exit code 5
I did a quick strace diff between the 2 versions and find nothing significant.
Exit code 5 according to man pages:
the DEVICE reports an "illegal request" with an additional sense code other than "invalid operation code". This is often a supported command with a field set requesting an unsupported capability. For commands that require a "service action" field this value can indicate that the command is not supported.
I thought perhaps WCE isn't a supported capability but I can change the bit just fine.
[root@abc ~]# sdparm --set WCE=0 /dev/sdy --verbose; echo "exit code" $?
mp_settings: page,subpage=0x8,0x0 num=1
pdt=5120 start_byte=0x2 start_bit=2 num_bits=1 val=0 acronym: WCE
/dev/sdy: ATA WDC WUH721818AL W233
mode sense(10) cdb: [5a 00 08 00 00 00 00 00 04 00]
mode sense(10) cdb: [5a 00 08 00 00 00 00 00 24 00]
mode select(10) cdb: [55 10 00 00 00 00 00 00 24 00]
exit code 0
[root@abc ~]# sdparm --get WCE /dev/sdy --verbose; echo "exit code" $?
mp_settings: page,subpage=0x8,0x0 num=1
[0x8,0x0] pdt=5120 start_byte=0x2 start_bit=2 num_bits=1 val=0 acronym: WCE
/dev/sdy: ATA WDC WUH721818AL W233
WCE 0 [cha: y]
exit code 5