Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
171
18.10.7
Mode Page 07 (Verify Error Recovery Parameters)
Table 140 Mode Page 07 (Verify Error Recovery Parameters)
Byte
Bit
Default
7 6 5 4 3 2 1 0
0
PS 0 Page Code = 07h
87h
1
Page Length = 0Ah
0Ah
2
Reserved = 0 EER=0 PER DTE DCR=0
00h
3
Verify Retry Count
01h
4
Obsolete =0
00h
5 - 9
Reserved = 0
00h
10-11
(MSB)
Verify Recovery Time Limit
(LSB)
00h
The Verify recovery parameters are used by the Target when recovering from and reporting errors associated with
the verification of the Initiator's Data for the following commands:
- VERIFY
- WRITE AND VERIFY - the verify portion of the command only.
- EER This bit is 0 since the Target does not support early recovery.
- PER (post error) bit is set to one to indicate that the drive reports recovered errors. The PER and DTE bit
settings in mode page 7 override those of mode page 1 during VERIFY and the Verify portion of WRITE AND
VERIFY
- DTE (Data Terminate on Error) bit set to one specifies that data transfer will be halted when the first recovered
error is encountered. PER must be set to one when DTE is set to one. DTE set to zero will cause data transfer
to continue when recovered errors are encountered
- DCR - Reserved
- Verify Retry Count sets a limit on the amount of verify recovery procedure (VRP) passes the Target attempts
when recovering verify errors. The Verify Retry Count of one causes the Target to attempt up to one VRP pass
per command when a medium error occurs during a verify operation. Only values of 0h and 01h are valid. The
value of 0h disables all recovery.
- Verify Recovery Time Limit indicates the period in 1 millisecond increments for the maximum recovery time of
a single LBA during the verify operation. The value must be from 40 ms to 65535 ms (65.5 seconds). The
granularity of the timer is 50ms. If an LBA is not able to be recovered within the limit, a Check Condition will be
returned.