If the value 0x1000 is the parameter code for Write Cycles, you may try sg_logs command with --paramp option set to 4096 (decimal number of 0x1000) as well as --page.
If this does not work, you probably need to get the complete log page 37h, and decode the result.
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TAKESHI ISHIMOTO
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Original Message:
Sent: Wed March 31, 2021 04:09 PM
From: James Thompson
Subject: LTO-8 Performance statistics log page 0x37
Have some IBM tape drives on RHEL7 where tapestats isn't working. Wondering if I can get the information I need from the tape log pages. But I can't seem to get the sub pages from log page 0x37.
IBM® TotalStorage® LTO Ultrium Tape Drive SCSI Reference (LTO-5 through LTO-8)
Ibm | remove preview |
| IBM® TotalStorage® LTO Ultrium Tape Drive SCSI Reference (LTO-5 through LTO-8) | This reference guide provides detailed information about the IBM® TotalStorage® LTO Ultrium Tape Drive's small computer interface (SCSI) command support. This covers LTO-5 through LTO-8. This highly technical document is of interest to device driver developers, application developers, systems administrators, and software installers. | View this on Ibm > |
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The scsi reference shows a log page that may have what I'm looking for.
Table 273 - LP 37h: Performance Characteristics: Mode Phase Timing Windows
Log page and code, 37h:1000h
But if I try sg_logs /dev/st0 --page=0x37,0x1000
I get an error message: Bad second value in argument to '--page='
Anyone know the correct linux syntax?
Tried the -aa option to display everything, but that errors as well.
sg_logs /dev/st0 -aa
IBM ULTRIUM-TD7
log_sense: field in cdb illegal
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James Thompson
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