- Configure the ALUA option on Promise storage (use WebPAM)
1. Device > Component List > Controller > settingChoose the option what's "LUN Affinity" and "ALUA".
2. Distribute the RAID to preferred Controller ID when build up LD (Logical Device) .
- Configure the partition and multipath on OS
1. Check the partition ready on system.cat /proc/partitions
major minor #blocks name
8 0 488386584 sda
... ...
8 48 21484373504 sdd
8 32 21484373504 sdc
2. If not dm-X device , then need to install and start the multipath daemon on the system.
# Install device mapper
yum install device-mapper-multipath -y
# Install Promise alua driver
rpm -ivh scsi_dh_alua_Vtrak-2-1.x86_64.rpm
# Configure multipath.conf
cat /etc/multipath.conf
------------------------------
defaults {
user_friendly_names yes
}
blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^(hd|xvd)[b-z][[0-9]*]"
devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*"
}
devices {
device {
vendor "Promise"
product "VTrak"
path_grouping_policy group_by_prio
getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
prio alua
path_checker tur
path_selector "round-robin 0"
hardware_handler "1 alua"
failback immediate
rr_weight uniform
rr_min_io 5000
no_path_retry queue
features "1 queue_if_no_path"
product_blacklist "VTrak V-LUN"
}
}
----------------------
# Start the multipath daemon, and add into chkconfig.
/etc/init.d/multipathd start
chkconfig multipathd on
chkconfig --list multipathd
multipathd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
# Confirm the multipath status
multipath -ll -v2
... ...
mpatha (222XXXXXXXXXXXXXX) dm-0 Promise,VTrak E830f
size=20T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='round-robin 0' prio=130 status=active
| `- 7:0:0:5 sdc 8:32 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 8:0:0:5 sdd 8:48 active ready running
- Format file system, and mounting
1. Format to xfs file system.# need to install xfsprogs on system . sunit dependent on RAID strip size (unit: block size)
yum install xfsprogs -y
mkfs -t xfs -f -d sunit=128,swidth=128 /dev/dm-0
2. Label the partition
xfs_admin -L "test01" /dev/dm-0
3. Edit the fstab to mount.
#Add configuration into /etc/fstab
LABEL="test01" /test01 xfs defaults,sunit=128,swidth=128 0 0
mkdir /test01
mount -a
3. df -h to check the partition status. Run touch to test the function.
df -h
touch /test01/test.file
Done
--
OS: Scientific Linux 6.4
(base on RHEL 6)
Promise Vtrak support alua on RHEL 5.4
http://kb.promise.com/KnowledgebaseArticle10261.aspx
