Configuring RAID vdisk
1. Install the omsa on a dell system:
>wget -q -O - http://linux.dell.com/repo/hardware/latest/bootstrap.cgi | bash
Downloading GPG key: http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-dell
Key already exists in RPM, skipping
Downloading GPG key: http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-libsmbios
Key already exists in RPM, skipping
Write repository configuration
Downloading repository RPM
Installing repository rpm: http://linux.dell.com/repo/hardware/latest/platform_independent/rh50_64/prereq/dell
-omsa-repository-2-5.noarch.rpm
Installing yum plugins for system id
Loaded plugins: dellsysid, security
dell-omsa-indep
| 1.9 kB 00:00
dell-omsa-specific
| 1.9 kB 00:00
Setting up Install Process
Package yum-dellsysid-2.2.26-6.2.el5.x86_64 already installed and latest version
Nothing to do
Loaded plugins: dellsysid, security
-bash-3.2$ cat vdisk.html
Configuring RAID vdisk
Configuring RAID vdisk
1. Install the omsa on a dell system:
>wget -q -O - http://linux.dell.com/repo/hardware/latest/bootstrap.cgi | bash
Downloading GPG key: http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-dell
Key already exists in RPM, skipping
Downloading GPG key: http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-libsmbios
Key already exists in RPM, skipping
Write repository configuration
Downloading repository RPM
Installing repository rpm: http://linux.dell.com/repo/hardware/latest/platform_independent/rh50_64/prereq/dell
-omsa-repository-2-5.noarch.rpm
Installing yum plugins for system id
Loaded plugins: dellsysid, security
dell-omsa-indep
| 1.9 kB 00:00
dell-omsa-specific
| 1.9 kB 00:00
Setting up Install Process
Package yum-dellsysid-2.2.26-6.2.el5.x86_64 already installed and latest version
Nothing to do
Loaded plugins: dellsysid, security
No plugin match for: rhnplugin
Cleaning up Everything
Done!
bash-3.2# yum install srvadmin-all
Loaded plugins: dellsysid, security
dag
| 951 B 00:00
dag/primary
| 284 kB 00:00
dag
717/717
dag-noarch
| 951 B 00:00
dag-noarch/primary
| 186 kB 00:00
dag-noarch
447/447
dell-omsa-indep
| 1.9 kB 00:00
dell-omsa-indep/primary
| 96 kB 00:00
dell-omsa-indep
719/719
dell-omsa-specific
| 1.9 kB 00:00
dell-omsa-specific/primary
| 1.0 kB 00:00
dell-omsa-specific
2/2
openafs-1.4.12
| 951 B 00:00
openafs-1.4.12/primary
| 11 kB 00:00
openafs-1.4.12
73/73
stanford
| 951 B 00:00
stanford/primary
| 25 kB 00:00
stanford
98/98
stanford-noarch
| 951 B 00:00
stanford-noarch/primary
| 44 kB 00:00
stanford-noarch
155/155
stanford-rhel
| 1.1 kB 00:00
stanford-rhel/primary
| 1.2 MB 00:00
stanford-rhel
3316/3316
stanford-rhel-supplementary
| 951 B 00:00
stanford-rhel-supplementary/primary
| 46 kB 00:00
stanford-rhel-supplementary
119/119
stanford-rhel-vt
| 1.1 kB 00:00
stanford-rhel-vt/primary
| 24 kB 00:00
stanford-rhel-vt
76/76
Setting up Install Process
Package srvadmin-all-6.5.0-1.1.1.el5.x86_64 already installed and latest version
Nothing to do
2 Modify the srvadmin-services.sh script to run only the appropriate services
(particularly excluding the service that starts the daemon process listening on TCP port 1311)
# list of services start
arrayStart=(racsvc instsvcdrv dataeng dsm_om_shrsvc dsm_om_connsvc racser racvnc racsrvc)
arrayStart=(racsvc instsvcdrv dataeng) <---------CHANGE TO THIS!
# list of services to stop
arrayStop=(racsvc dsm_om_shrsvc dsm_om_connsvc racser racvnc racsrvc dataeng instsvcdrv)
arrayStop=(racsvc instsvcdrv dataeng)<---------CHANGE TO THIS!
3. Look at the commands here are some references:
for commands go to /opt/dell/srvadmin/bin om bun
websites for command support:
http://support.dell.com/support/edocs/software/svradmin/1.9/en/stormgmt/cli.html#1092658
http://support.dell.com/support/edocs/software/svradmin/2.1/en/cli/cli_cc1b.htmo
http://www.dell.com/downloads/global/products/pvaul/en/perc-technical-guidebook.pdf
PERC
4. To create vdisk run:
omconfig storage controller action=createvdisk controller=0 raid= adisk= [stripesize=< 2kb to 128kb>]
[cachepolicy=] [readpolicy=] [writepolicy=] [name=] [sp
anlength=]
Listed are the flags descriptions:
RAID -0 = concatenated disks fast read writes no redundancy
RAID 0 = striping across all disks, no redundancy no rebuild
RAID 1 = mirroring, needs double the disks. redundancy slow writes.
RAID 5 = striping and parity info on all disks slow writes redundant
RAID 6 = striping and dual parity can survive two disk failures. slow W fast-r
RAID 50 = concatenated parity across 2 3pair disks. high redundancy
RAID 10 = mirrored, striped drives, no parity, good writes best redundancy
RAID - parity is in liu of mirrored disks.
for size- pick a size needed for each vdisk. or for RAID 50 size=max
for the adisk = include the channel per disk, adisk=0:0,0:1,0:2,0:3,0:4 etc
for striping = stripesize=16kb can do any size depends on whats needed.
for cachepolicy default is direct I/Os writes to contr cache and host
for readpolicy I like ara it adjusts its reading depending on the history.
for write policy I would say go with the wt option. Means it writes through cache beter data security. write-b
ack can cause data loss. caches before writing to disk. not available on controllers without batteries.
to build a RAID 50 with all drives on controller 0 connector 0 12 drives:
omconfig storage controller action=createvdisk controller=0 raid=r50 size=max adisk=0:0,0:1,0:2,0:3,0:4,0:5,0:
5,0:7,0:8,0:9,0:10,0:11 stripesize=128kb cachepolicy=d readpolicy=ara writepolicy=wt name=BigVdisk spanlength=
4
#--ACTUAL SUCCESSFUL COMMAND for raid50 12 disks 128 stripe spanlength 4
-bash-3.2$ sudo /opt/dell/srvadmin/sbin/omconfig storage controller action=createvdisk controller=0 raid=r50 s
ize=max adisk=0:0:0,0:0:1,0:0:2,0:0:3,0:0:4,0:0:5,0:0:6,0:0:7,0:0:8,0:0:9,0:0:10,0:0:11 stripesize=128kb name=
BigVdisk spanlength=4
Command successful!
## -- the SAS controller we have does not have cachepolicy options nor do we have the spanlength option it is
only by default. if you do a raid 10 or 50 the size option can only be max.
## 6.4 command docs here: http://support.dell.com/support/edocs/software/svradmin/6.4/en/CLI/PDF/CLIUG.pdf
## -- ACTUAL COMMAND for first vidsk0:
-bash-3.2$ sudo omconfig storage controller action=createvdisk controller=0 raid=r6 size=max pdisk=0:0:0,0:0:1
,0:0:2,0:0:3,0:0:5 stripesize=64kb readpolicy=ara writepolicy=wt diskcachepolicy=enabled name=Vdisk0
Command successful!
##- disk 0:0:4 dedicated to vidisk0 hotspare
##---ACTUAL COMMAND for vdisk1:
-bash-3.2$ sudo omconfig storage controller action=createvdisk controller=0 raid=r6 size=max pdisk=0:0:6,0:0:7
,0:0:8,0:0:9,0:0:10,0:0:11 stripesize=64kb readpolicy=ara writepolicy=wt diskcachepolicy=enabled name=Vdisk1
Command successful!
## -- pdisk 0:0:6 dedicated to vidisk1 hotspare
#-- To remove a vdisk
sudo omconfig storage vdisk action=deletevdisk controller=0 vdisk=0 force=yes
##--ACTUAL DELETE COMMAND--##
-bash-3.2$ sudo omconfig storage vdisk action=deletevdisk controller=0 vdisk=0 force=yes
Command successful!
##--RECONFIGURE--### can't be done at this raid level(r6)
-bash-3.2$ sudo omconfig storage vdisk action=reconfigure controller=0 vdisk=1 raid=r6 pdisk=0:0:5,0:0:6,0:0:7
,0:0:8,0:0:9,0:0:10,0:0:11
Cannot reconfigure to the given RAID level<---------#########
####
-bash-3.2$ omreport storage vdisk controller=0
List of Virtual Disks on Controller PERC H800 Adapter (Slot 1)
Controller PERC H800 Adapter (Slot 1)
ID : 0
Status : Ok
Name : BigVdisk
State : Background Initialization
Encrypted : No
Progress : 0% complete
Layout : RAID-50
Size : 16,762.50 GB (17998597324800 bytes)
Device Name : /dev/sdb
Bus Protocol : SAS
Media : HDD
Read Policy : No Read Ahead
Write Policy : Write Back
Cache Policy : Not Applicable
Stripe Element Size : 128 KB
Disk Cache Policy : Disabled
## for dedicated hotspare for one vdisk
omconfig storage vdisk action=assigndedicatedhotspare controller=0 vdisk=0 pdisk=0:0:4 assign=yes #for vdisk0
## for global hotspare which can work for more than one vdisk.
-bash-3.2$ sudo omconfig storage pdisk action=assignglobalhotspare controller=0 pdisk=0:0:4 assign=yes
[sudo] password for admin:
Command successful!
## - to reconfigure the vdisk
omconfig storage vdisk action=reconfigure
controller=id vdisk=id raid= pdisk= [size=
vdcapacityexpansion=yes sizeinpercent=<1 to 100>]
-bash-3.2$
#--this initialized the vdisk
sudo omconfig storage vdisk action=fastinit controller=0 vdisk=0
sudo omconfig storage vdisk action=fastinit controller=0 vdisk=1
ran the fdisk and built the following with 17 terrabytes
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 15872636 5962476 9090848 40% /
/dev/sda4 211802204 191832 200677740 1% /data
/dev/sda1 101086 18015 77852 19% /boot
tmpfs 4082004 0 4082004 0% /dev/shm
/dev/sdb1 234860444 60564 222869612 1% /vdisk1
/dev/sdb2 234860476 60564 222869644 1% /vdisk2
/dev/sdb3 234860476 60564 222869644 1% /vdisk3
/dev/sdb5 234860444 60564 222869612 1% /vdisk5
/dev/sdb6 234860444 60564 222869612 1% /vdisk6
/dev/sdb7 234860444 60564 222869612 1% /vdisk7
/dev/sdb8 704615296 70656 668752224 1% /BigVdisk8
cluster-enabled RAID Controllers
CERC