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Managing the AMASS File System
4-48 Utility Reference 6-00028-01 Rev A
Output for streaming tape I/O (quedisplay -c)
looks similar to the example shown in the following
example:
# quedisplay -c
VOLUME vid=7, num_reads=0, num_writes=30
WRITEQ rid=27931,
fptr=0xc00000000031c078, vol=3,
fnode_flags=0xb040804
Request Cache blocks:
~
cbq_ptr: 0x04030c90
UNADJ_cbque_flink: 0x04030c
b
UNADJ_cbque_blink: 0x04030c
tp_sblk : 0x0000260f
tp_eblk : 0x0000264e
tp_iocc : 0x01000000
cbq_stat: PEND
cbq_cbdata:
c_blno: 0x00230010
c_bcnt: 0x01000000
c_boff: 0x27000000
>
cbq_ptr: 0x04030cb8
UNADJ_cbque_flink: 0x04030c
UNADJ_cbque_blink: 0x04030c
tp_sblk : 0x0000264f
tp_eblk : 0x00000000
tp_iocc : 0x00e00000
cbq_stat: QUED
cbq_cbdata:
c_blno: 0x40230010
c_bcnt: 0x01000000
The tp_sblk and tp_eblk fields are the start
and end archive device block locations
where the cache block is written.
The cbq_stat field is the current
state of the streaming cache block.
The tp_iocc field is the byte count
associated with the cache block.
Cache block 0x40230010 is currently
being copied. (This can be deduced from
(cbq_stat == QUED) && (tp_iocc > 0) &&
(tp_iocc < c_bcnt)).
Cache block number (c_blno) 0x00230010
is pending physical I/O completion.
The cbq_cbdata field is an I/O descriptor
containing the device number, block address
offset, byte count, and file offset of the cache
device data being copied to tape.