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| NOTES: |
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| Bytes 12 to 19 are returned only if the device operating definition is | ||
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| Table | |
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Field |
| Default | Description |
| Value | ||
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| Parameters Savable. This bit is only used with the MODE SENSE command. A |
PS |
| 1 | returned value of 1 indicates that the target is capable of saving the page in a |
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| mand. |
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| An initiator control (ic) enable bit set to one specifies that the device server use |
IC |
| 0 | the NUMBER OF CACHE |
| SEGMENTS field or the CACHE SEGEMENT SIZE field, dependent upon the | ||
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| SIZE bit, to control the caching algorithm rather than the device server’s own |
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| adaptive algorithm. |
ABPF |
| 0 | Enable Abort Prefetch. When set, this bit requests the device abort |
| work on the receipt of a new command.Ignored by the drive | ||
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| A caching analysis permitted (cap) bit set to one specifies that the device server |
CAP |
| 0 | perform caching analysis during subsequent operations. A cap bit set to zero |
| specifies that the caching analysis be disabled to reduce overhead time or to pre- | ||
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| vent non pertinent operations from impacting tuning values. |
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| A discontinuity (DISC) bit set to one specifies that the device server continue |
DISC |
| 0 | the |
| of the buffer, or segment, space available for the | ||
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| zero specifies that |
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| ignored by drive. |
Size |
| 0 | Specifies which of two fields are used to configure the cache. When Size=0, the |
| Number of Cache Segments field is used. When Size=1, the Cache Segment | ||
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| Size field is used. |
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| Write Cache Enable. The default value of 1 enables |
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| processing a WRITE command. When set to 0 the drive returns a GOOD status |
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| and COMMAND COMPLETE only after successfully writing all the data to the |
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| media. |
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| When WCE = 1, |
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| mand. The drive returns a GOOD status and COMMAND COMPLETE only af- |
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| ter fetching the data from the initiator and placing it in the drive’s cache |
WCE |
| 1 | memory. |
| Note: For maximum data integrity, it is strongly recommended that when WCE | ||
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| is set to 1, the |
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| • AWRE to 1 |
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| • RC to 0 |
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| • DCR to 0 |
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| • Correction Span set to 170 |
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| • Head Offset to 0 |
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| • Servo Offset to 0 |
MF |
| 0 | Multiplication Factor (value must be 0). The drive interprets the minimum and |
| maximum | ||
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| each of the respective types of prefetch. |
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| Read Cache Disable. The default value of 0 enables the read cache capability |
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| and allows the drive to use |
RCD |
| 0 | READ command. |
| When the value is 1, read caching is disabled and the data returned in response | ||
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| to a READ command is fetched from the medium and not from the drive’s cache |
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| memory. |
Maxtor Atlas 10K V |