SSC-3: Locate, MEDIUM ERROR & BLANK CHECK
kevin.jones at hp.com
Wed Jun 3 01:57:58 PDT 2009
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All HP LTO drives ever shipped report BLANK CHECK.
All HP DDS drives ever shipped report BLANK CHECK.
I don't think reporting MEDIUM ERROR is a good idea.
HP DDS, LTO Tape firmware.
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----- Original Message -----
From: Kevin D Butt
To: t10 at t10.org
Sent: Tuesday, June 02, 2009 10:44 PM
Subject: SSC-3: Locate, MEDIUM ERROR & BLANK CHECK
Tape guru's, in both the LOCATE(10) and LOCATE(16) commands the following
statement is found:
<<If end-of-partition is encountered, CHECK CONDITION status shall be
returned, the sense key shall be set to MEDIUM ERROR, and the sense data EOM
bit shall be set to one.>>
It seems to me to be very poor to return MEDIUM ERROR instead of BLANK
CHECK. A user should not be told the medium is bad. This could cause them
to call service when in fact, the error was not medium related. SCSI-2 did
not have this statement. It was introduced in SSC and therefore has been
there for a while. Do other tape devices actually return a MEDIUM ERROR
instead of BLANK CHECK?
Kevin D. Butt
SCSI & Fibre Channel Architect, Tape Firmware
MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
Fax: 520-799-2723 (T/L:321)
Email address: kdbutt at us.ibm.com
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