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Full Discussion: SLOW mksysb
Operating Systems AIX SLOW mksysb Post 302337192 by Padow on Thursday 23rd of July 2009 02:56:06 PM
Old 07-23-2009
You can do a mksysb to disk. that will show if it's a system issue or a tape drive issue. You can try setting the block size to 262144, which should speed things up. If I remember correctly, if you point your mksysb to /dev/rmt0.1, your tape will be rewinded for you once it completes.
Padow
 

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TS(4)							     Kernel Interfaces Manual							     TS(4)

NAME
ts - TS-11 magtape interface SYNOPSIS
/sys/conf/SYSTEM: NTS ts_drives # TS11 /etc/dtab: #Name Unit# Addr Vector Br Handler(s) # Comments ts ? 172520 224 5 tsintr # ts11 driver major device number(s): raw: 8 block: 2 minor device encoding: bits 0003 specify TS drive bit 0004 specifies no-rewind operation bit 0010 ignored DESCRIPTION
The ts-11 combination provides a standard tape drive interface as described in mtio(4). The ts-11 operates only at 1600 bpi, and only one transport is possible per controller. FILES
/dev/MAKEDEV script to create special files /dev/MAKEDEV.local script to localize special files SEE ALSO
mt(1), tar(1), tp(1), mtio(4), ht(4), tm(4), dtab(5), autoconfig(8) DIAGNOSTICS
ts%d: no write ring. An attempt was made to write on the tape drive when no write ring was present; this message is written on the termi- nal of the user who tried to access the tape. ts%d: not online. An attempt was made to access the tape while it was offline; this message is written on the terminal of the user who tried to access the tape. ts%d: hard error bn%d xs0=%b xs1=%b xs2=%b xs3=%b. A hard error occurred on the tape at block bn; status registers 0-3 are printed in octal and symbolically decoded as bits. ts%d: addr mod 4 != 0. The address of a TS-11 command packet was not on an even longword boundary. BUGS
If any non-data error is encountered on non-raw tape, it refuses to do anything more until closed. The device lives at the same address as a tm-11 tm(4). 3rd Berkeley Distribution January 28, 1988 TS(4)
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