Manage Primary B-Ll - HP C2488A Technical Reference Manual

Manage Primary
Manage Primary
The MANAGE PRIMARY command is used to manage the Primary Defect list (Plist). The
command has three options:
delete
the current Plist,
append
defects to the current Plist,
or
replace
the current Plist with a new Plist. When appending or replacing the Plist, this
command causes the specified physical blocks to be reassigned as primary defects and added
to the Plist.
The delete and replace options are implemented by performing a full device format, which will
cause the loss of all user data and log information. Any data residing on the media before
these options are implemented will be lost. Any existing Grown Defect List (Glist) defect
information will also be lost. The current operating MODE SELECT parameters will become
the saved parameters following this command.
The append option will only update the list of Plist entries. The media will not be
reinitialized, but the mapping to user data will be altered such that data resident on the
media prior to the append operation will be lost.
The operation of the MANAGE PRIMARY command is similar to the FORMAT UNIT
command.
Caution
,
The MANAGE PRIMARY command allows the Target to overwrite any or all
of the Initiator-addressable data space. This command should be performed
only when no data retention is required.
Use of this command should be restricted to development or other
highly controlled environments. Any use of this command other than at
Hewlett-Packard approved sites may be deemed a violation of warranty.
There are three possible sources of defect location information during execution of the
MANAGE PRIMARY command:
Plist (Primary Defect List). The list of permanent defects supplied by the original
manufacturer. The Plist is located outside of the Initiator-accessible logical block space. The
Plist is accessible by the Target (to ·reference while formatting); but-is not normally accessible
by the Initiator except through the READ DEFECT command.
Dlist (Data Defect List). Supplied by the Initiator in the Data Out phase of the MANAGE
PRIMARY command.
Glist (Grown Defect List.) Maintained by the Target and includes all defects sent to the
Target from the Initiator (the Dlist), any defects identified by the Target during previous
and current MANAGE PRIMARY operations, and any defects identified by a REASSIGN
BLOCKS command. The Glist does NOT include the Plist. Any execution of the MANAGE
PRIMARY command will delete the current Glist (if present).
DRAFT Vendor Unique Command Descriptions 8·11
1/18/93 09:58