User Manual

SCSI Commands Reference Manual, Rev. J 486
www.seagate.com Parameters for direct access devices
NO_PI_CHK bit
1 a NO PROTECTION INFORMATION CHECKING (NO_PI_CHK) bit set to one indicates that the device server disables checking of all
protection information for the associated protection information interval when performing a write operation if:
a) the LOGICAL BLOCK APPLICATION TAG field is set to FFFFh and type 1 protection (see SBC-4) is enabled;
b) the LOGICAL BLOCK APPLICATION TAG field is set to FFFFh and type 2 protection (see SBC-4) is enabled; or
c) the LOGICAL BLOCK APPLICATION TAG field is set to FFFFh, the LOGICAL BLOCK REFERENCE TAG field is set to
FFFF FFFFh, and type 3 protection (see SBC-4) is enabled.
0 A NO_PI_CHK bit set to zero indicates that the device server checks protection information as specified by the WRPROTECT field (see
SBC-4) when performing a write operation.
P_I_I_SUP bit
1 A protection information interval supported (P_I_I_SUP) bit set to one indicates that the logical unit supports protection information
intervals (see SBC-4).
0 A P_I_I_SUP bit set to zero indicates that the logical unit does not support protection information intervals.
LUICLR bit
1 A logical unit I_T nexus clear (LUICLR) bit set to one indicates the SCSI target device clears any unit attention condition with an addi-
tional sense code of REPORTED LUNS DATA HAS CHANGED in each logical unit accessible to an I_T nexus after reporting the unit atten-
tion condition for any logical unit over that I_T nexus (see SAM-5).
0 An LUICLR bit set to zero indicates the SCSI target device clears unit attention conditions as defined in SPC-5.
The LUICLR bit shall be set to one.
R_SUP bit
0 A referrals supported (R_SUP) bit set to zero indicates that the device server does not support referrals (see SBC-4).
1 An R_SUP bit set to one indicates that the device server supports referrals.
RTD_SUP bit
0 An RTD_SUP bit set to zero indicates that the RTD bit in MODE SELECT commands is not supported.
1 An RTD bit set to one indicates that the RTD bit in MODE SELECT commands is supported.
HSSRELEF bit
1 A HSSRELEF bit set to one indicates the device server implements alternate reset handling for history snapshots.
0 A history snapshots release effects (HSSRELEF) bit set to zero indicates the device server implements normal reset handling for history
snapshots.
MULTI I_T NEXUS MICROCODE DOWNLOAD field
The MULTI I_T NEXUS MICROCODE DOWNLOAD field (see SPC-5) indicates how the device server handles concurrent attempts to
download microcode using the WRITE BUFFER command (see SPC-5) from multiple I_T nexuses.