Seagate ST3146807FC Read retry Maximum recovery time per Write retry, Count1 LBA cumulative, msec

32 Cheetah 10K.6 FC Product Manual, Rev. B

When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still perform data recovery actions within the limits defined by the Read Retry Count, Write Retry Count, and Recovery Time Limit parameters. However, the drive does not report any unrecovered errors.

Table 2: Read and write retry count maximum recovery times

Read retry	Maximum recovery time per	Write retry	Maximum recovery time per
count1	LBA (cumulative, msec)	count1	LBA (cumulative, msec)
0	77.7	0	35.9
1	89.7	1	53.8
2	305.0	2	59.8
3	328.9	3	113.7
4	370.8	4	227.4
5	418.6	5 (default)	269.2
6	532.3
7	544.3
8	568.2
9	622.0
10	682.5
11 (default)	1,377.5

[1]Setting these retry counts to a value below the default setting could result in degradation of the unrecov- ered error rate. For example, suppose the read/write recovery page has the RC bit = 0, the read retry count set to 4, and the recovery time limit set to 450. A 4-block read command can take up to 370.8 msec recovery time for each block and a maximum of 450 msec recovery for all four blocks. If either of these lim- its is reached and a block has not yet been recovered, the command will end with Check Condition status and an unrecoverable read error will be reported.

7.3FC-AL system errors

Information on the reporting of operational errors or faults across the interface is given in the Fibre Channel Interface Manual. The FCP Response returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.

Status returned by the drive to the initiator is described in the Fibre Channel Interface Manual. Status reporting plays a role in systems error management and its use in that respect is described in sections where the various commands are discussed.