SCF Reference Manual for the Storage Subsystem (G06.27+, H06.04+)

Configuring Magnetic Disks
SCF Reference Manual for the Storage Subsystem—529937-008
6-3
Considerations for M8xxx Fibre Channel Disks
Considerations for M8xxx Fibre Channel Disks
•
In an FCDM containing M8xxx disks, at least one disk must be added for the
enclosure to be recognized by the storage subsystem.
•
Before you add the first M8xxx disk in an enclosure to the storage subsystem, the
primary and backup paths must be physically connected.
•
Before you add a mirrored pair of M8xxx disks to the storage subsystem, both
paths to the primary disk and the mirror disk must be physically connected.
•
The primary disk and mirror disk of a mirrored pair of M8xxx disks must be in
different FCDMs, connected to a different pair of Fibre Channel loops.
•
On NonStop S-series servers the system disk and its mirror cannot be M8xxx
Fibre Channel disks.
•
During normal operations, an M8xxx disk can only be mirrored with another
M8xxx disk. If you attempt to mirror an M8xxx disk with an internal disk or an
ESS disk, you trigger a migratory revive, causing the source drive to go hard down
Table 6-1. Disk Path Attributes
LOCATION
GROUP MODULE SLOT SAC DEVICEID PORTNAME LUN
Internal
SCSI Disk
1-89 1 1-18 1-2
* 0-9 * NA NA
45xx Disk 1-89 1 51-54
(SNDA)
1-4 0-7 NA NA
M8xxx Disk
NonStop
S-Series
11-89 2-3
(IOAM)
1-5
(FCSA)
1-2 Shelf 1-4
Bay 1-14
NA NA
NonStop
NS-Series
110-125 2-3
(IOAM)
1-5
(FCSA)
1-2 Shelf 1-4
Bay 1-14
NA NA
ESS Disk
NonStop
S-Series
11-89 2-3 1-5 1-2 NA 64-bit
WWN
0-
32767
NonStop
NS-Series
110-125 2-3 1-5 1-2 NA 64-bit
WWN
0-
32767
* For Internal SCSI disks, SAC and DEVICEID are not required. SCF derives these values from the slot.
LOCATION represents PRIMARYLOCATION, BACKUPLOCATION, MIRRORLOCATION, and
MBACKUPLOCATION.
SAC represents PRIMARYSAC, BACKUPSAC, MIRRORSAC, and MBACKUPSAC
DEVICEID represents PRIMARYDEVICEID, BACKUPDEVICEID, MIRRORDEVICEID, and
MBACKUPDEVICEID.
PORTNAME represents PRIMARYPORTNAME, BACKUPPORTNAME, MIRRORPORTNAME, and
MBACKUPPORTNAME.
LUN represents PRIMARYLUN and MIRRORLUN.