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