To specify the preferred path in a cross-path configuration, you must enable the ALUA mode. Before creating a GAD pair, enable the ALUA mode of the P-VOL. If the ALUA mode of the P-VOL is enabled, the ALUA mode of the S-VOL is also enabled when a GAD pair is created.
Note:
- It is not necessary to set the ALUA mode if the cross-path configuration is not used.
- If a volume connected to a host via NVMe-oF is used as a GAD pair volume, the ALUA mode setting is not required. (The ALUA equivalent function in the NVMe-oF host interface is not supported.)
Command example
raidcom modify ldev -ldev_id 0x2222 -alua enable -IH0
Check command and output example
Use the following command to verify that the ALUA mode is set correctly (ALUA: Enable is displayed).
raidcom get ldev -ldev_id 0x2222 -fx -IH0 Serial# : 822222 LDEV : 2222 SL : 0 CL : 0 VOL_TYPE : OPEN-V-CVS VOL_Capacity(BLK) : 1024000 NUM_PORT : 0 PORTs : F_POOLID : NONE VOL_ATTR : CVS : HDP B_POOLID : 0 LDEV_NAMING : STS : NML OPE_TYPE : NONE OPE_RATE : 100 MP# : 0 SSID : 0005 Used_Block(BLK) : 0 ALUA : Enable RSGID : 0