Hp-data values – HP Ultrium tape drives Q1538-90925 User Manual
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HP Ultrium drives technical reference manual, volume 5: UNIX configuration guide
25
HP restricted
HP-Data Values
The values for HP_LTO_GEN_n and name, which provide normal LTO mode, have the following
meanings:
The syntax for HP_LTO_GEN_n on Solaris 9 is:
typ e> = < bsize>, o f de nsities>, where: Parameter Value Meaning 1 or 2 Indicates the format of the following parameters. 0x36 or 0x3B The value for an Ultrium drive in /usr/include/sys/mtio.h. For Solaris 8, 0x36 indicates a type of MT_ISOTHER. Later versions of Solaris support the value 0x3B which indicates a type of MT_LTO. 0 Indicates variable block size. or 0x18659 This value is derived from constants provided in . The value determines which operations the driver can perform with the attached device by using a unique value for each feature and then adding them together to form the options value. Supported features will vary with OS revision, and may include the following: 0x001 Device supports variable length records. 0x008 Device can backspace over files (as in the ‘mt bsf’ option). 0x010 Device supports backspace record (as in ‘mt bsr’). 0x020 Device requires a long time-out period for erase functions. 0x040 Device will automatically determine the tape density. 0x0200 Device knows when end of data has been reached. 0x0400 Device driver is unloadable. 0x1000 Time-outs five times longer than normal. 0x4000 Driver buffers write requests and pre-acknowledges success to application. 0x8000 Variable record size not limited to 64 KB. 0x10000 Device determines which of the two mode pages the device supports for selecting or deselecting compression. So 0xd639 indicates variable record length, bsf and bsr enabled, long timeouts for erase, EOD recognition, Unloadable device driver, 5 x longer timeouts, buffer writes and pre-acknowledge sucess, variable records not limited to 64 KB, auto-density over-ride and MODE SELECT compression.
/usr/include/sys/scsi/targets/stdef.h