Multipath options with DS3000/DS4000/DS5000：
| DS Subsystem | Support multipath driver |
Default driver on AIX |
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| AIX5.2 | AIX5.3 | AIX6.1 | ||
| DS3000 | native MPIO only | MPIO | ||
| DS4000 | RDAC, native MPIO, MPIO w/SDDPCM | RDAC | RDAC | MPIO |
| DS5000 | native MPIO, MPIO w/SDDPCM |
MPIO |
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AIX MPIO is supported on AIX starting from AIX 5.2 TL10, AIX 5.3 TL6 and AIX 6.1 SP2 though various PTFs and fixes may be required (see interoperability matrix and AIX MPIO documentation below). It is supported with DS4000 firmware 6.60.xx.xx and higher on DS4800, DS4700, DS4200, DS4500 and DS4300. MPIO is the strategic driver for all current DS4000 platforms in AIX 6.1 and up – except for DS4400 which is RDAC only. RDAC is the default driver on all levels of AIX 5.2 and 5.3.
In AIX Version 6.1, the DS4K products are configured as Multipath I/O (MPIO) devices by default. A DS4K product using the FCPARRAY (RDAC) driver may be migrated to the MPIO driver by using the instructions found in the documents below, or all DS4K devices may be migrated by uninstalling the devices.fcp.disk.array.rte package and then running the cfgmgr command or rebooting.
Default driver on AIX6.1：
# oslevel -r 6100-03 # lsdev -Cc disk hdisk0 Available 08-08-00-5,0 16 Bit LVD SCSI Disk Drive hdisk1 Available 08-08-00-8,0 16 Bit LVD SCSI Disk Drive hdisk2 Available 05-08-01 MPIO Other DS4K Array Disk hdisk3 Available 05-08-01 MPIO Other DS4K Array Disk # lspath Enabled hdisk0 scsi0 Enabled hdisk1 scsi0 Enabled hdisk2 fscsi0 Enabled hdisk3 fscsi0 Enabled hdisk2 fscsi1 Enabled hdisk3 fscsi1 # mpio_get_config -Av Frame id 0: Storage Subsystem worldwide name: 60ab80011f0e000004d6f113e Controller count: 2 Partition count: 1 Partition 0: Storage Subsystem Name = 'DS4800' hdisk LUN # Ownership User Label hdisk2 0 B (preferred) 1 hdisk3 1 A (preferred) EBS
Default driver on AIX5.3：
BTW:当前主机连接一台DS4800存储
# oslevel -r 5300-10 # manage_disk_drivers 1: DS4100: currently RDAC; supported: RDAC/fcparray, MPIO 2: DS4300: currently RDAC; supported: RDAC/fcparray, MPIO 3: DS4500: currently RDAC; supported: RDAC/fcparray, MPIO 4: DS4700/DS4200: currently RDAC; supported: RDAC/fcparray, MPIO 5: DS4800: currently RDAC; supported: RDAC/fcparray, MPIO
Change default drive to MPIO from RDAC:
# manage_disk_drivers -c 5 DS4800 currently RDAC/fcparray Change to alternate driver? [Y/N] Y DS4800 now managed by MPIO It is necessary to perform a bosboot before rebooting the system in order to incorporate this change into the boot image. In order to change to the new driver, either a reboot or a full unconfigure and reconfigure of all devices of the type changed must be performed. # bosboot -a bosboot: Boot image is 40130 512 byte blocks. # shutdown -Fr # manage_disk_drivers 1: DS4100: currently RDAC; supported: RDAC/fcparray, MPIO 2: DS4300: currently RDAC; supported: RDAC/fcparray, MPIO 3: DS4500: currently RDAC; supported: RDAC/fcparray, MPIO 4: DS4700/DS4200: currently RDAC; supported: RDAC/fcparray, MPIO 5: DS4800: currently MPIO; supported: RDAC/fcparray, MPIO # lsdev -Cc disk hdisk0 Available 08-08-00-5,0 16 Bit LVD SCSI Disk Drive hdisk1 Available 08-08-00-8,0 16 Bit LVD SCSI Disk Drive hdisk2 Available 05-08-01 MPIO Other DS4K Array Disk # lspath Enabled hdisk0 scsi0 Enabled hdisk1 scsi0 Enabled hdisk2 fscsi0 Enabled hdisk2 fscsi1 # mpio_get_config -Av Frame id 0: Storage Subsystem worldwide name: 60ab80011f0e000004d6f113e Controller count: 2 Partition count: 1 Partition 0: Storage Subsystem Name = 'DS4800' hdisk LUN # Ownership User Label hdisk2 0 A (preferred) 1
AIX 6.1 TL4的命令与之前的版本有所不同：
#manage_disk_drivers Usage : manage_disk_drivers [-l] manage_disk_drivers -d device -o driver_option manage_disk_drivers -h Meaning of the Flags: -l: Display the Devices, Present Drivers, and Driver Options -d: The Device to change the Driver -o: Selects the new Driver -h: should be help but is interpreted as an illegal option #manage_disk_drivers -l 查看当前使用的是哪种多路径模式 Device Present Driver Driver Options DS4100 AIX_APPCM AIX_APPCM,AIX_fcparray DS4300 AIX_APPCM AIX_APPCM,AIX_fcparray DS4500 AIX_APPCM AIX_APPCM,AIX_fcparray DS4700 AIX_APPCM AIX_APPCM,AIX_fcparray DS4800 AIX_APPCM AIX_APPCM,AIX_fcparray DS5020 AIX_APPCM AIX_APPCM DS5100/DS5300 AIX_APPCM AIX_APPCM AIX_APPCM #manage_disk_drivers -d DS4800 -o AIX_fcparray 将DS4800由AIX_APPCM（MPIO）改成AIX_fcparray（RDAC） #bosboot -a
-The End-
