described below). The current position is set after the last block that was returned or partially returned
SILI Suppress Incorrect Length Indicator
0The read operation is terminated when the length of a block (on the tape) differs from the Transfer Length. Transfer Length bytes of data will have been transferred. The logical tape position will be the EOM side of the illegal sized block.
1The drive will not report CHECK CONDITION status if the only error is that the Transfer Length is not equal to the actual block length recorded on the media.
Fixed | 0 | The Transfer Length field specifies the length of the transfer in bytes. |
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| A single block of the length in Transfer Length is to be transferred. |
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| • If the next block on tape is of Transfer Length, it is transferred to the initiator |
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| and GOOD status is returned. |
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| • If the next block on tape is not of Transfer Length: |
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| • If it is shorter, the whole block is transferred to the initiator. |
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| • If it is longer, only the length requested is returned and the logical position is |
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| set to after the record. |
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| • If SILI = 0, CHECK CONDITION status is returned. ILI is reported as described |
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| below. |
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| • If SILI = 1, GOOD status is returned. |
| 1 | The Transfer Length field specifies the length of the transfer in blocks. The size of each |
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| block (in bytes) is specified by the current block length specified in the Mode Parameter |
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| block descriptor. |
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| If SILI = 0, a sequence of blocks of the currently configured block length is to be returned, |
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| the number of blocks being indicated in the Transfer Length field. |
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| • If there is a sequence of blocks of this length on the tape, they are returned to |
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| the initiator with GOOD status. |
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| • If a block that is shorter than the configured length is encountered before the |
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| sequence is complete, the blocks up to that block are returned followed by all |
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| of that block and CHECK CONDITION status (ILI will be reported as described |
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| below). The current position is set after the last block that was returned. |
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| • If a block that is longer than the configured length is encountered before the |
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| sequence is complete, the blocks up to that block are returned followed by the |
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| configured length from the record that was too long and CHECK CONDITION |
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| status (ILI will be reported as described below). The current position is set |
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| after the last block that was partially returned. |
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Transfer | 0 | No data is transferred. This is not considered an error and the current logical position will |
Length |
| be unchanged. |
| >0 | The amount of data to be transferred, in bytes or blocks as specified by the Fixed field. |
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| NOTE: Transfers of 4 bytes or less are not supported. |
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Commands
READ 08h 107