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manual abstract
Mediainit(1) format operation fails to media
Problem:
In certain scenarios, format operation initiated using the mediainit(1) command fails as the
format ioctl (SIOC_FORMAT) issued by mediainit(1) fails to format the storage media.
This format failure has been seen with JBOD devices DS2405, DS2100, DS2110, DS2120 and
msa30 while connected through the following interface cards but may not be limited to these
cards.
HP-UX FC Tachlite HBAs (A5158A, A6795A)
HP-UX FC Qlogic HBAs (A6826A, AB465A, A9782A, A7538A, A9784A, AD194A,
AB429A, AB378A, AB379A, AB379B, AB378B, AD193A, 403619-B21, AD300A,
AE311A, AH401A, AH400A, 451871-B21)
HP-UX Ultra320 HBA (A7173A, AB290A)
This issue is caused due to target not responding to Diagnostic disk monitor commands while
SCSI format is in progress. The error recovery of above mentioned HBA’s terminates all
outstanding commands on the target and hence mediainit(1) command fails. This failure
renders the size of the medium as zero, which makes the medium unusable.
For example, in the scenario mentioned below, mediainit(1) fails to format the disk and the
subsequent diskinfo(1M) issued on the same disk reports the disk size as zero.
# mediainit -v /dev/rdsk/c20t6d0
mediainit: initialization process starting
...mediainit: locking SCSI device
mediainit: initializing media
............................mediainit: initialize media command failed.
# diskinfo /dev/rdsk/c20t6d0
SCSI describe of /dev/rdsk/c20t6d0:
vendor: HP 36.4G
product id: ST336607LC
type: direct access
size: 0 Kbytes
bytes per sector: 512
Affected OS Versions:
-
HP-UX 11.23 (all revisions)
-
HP-UX 11.31 (all revisions)
Cause:
This problem is seen when a receive diagnostics or an inquiry command is sent to the disk when
the mediainit(1) initiated format is in progress. The error recovery process in the different
drivers fails all commands to the media including the mediainit(1) format command due to
the time out of the diagnostics/inquiry command.
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