Profile

Cover photo
SYSADMIN SHARE
35 followers|36,494 views
AboutPosts

Stream

SYSADMIN SHARE

Shared publicly  - 
Scenario : The SAN team allocated a new lun to the HOST (Physical server) where the VM machine is running. And now u need to add that lun to HOST node and then add that disk to Gust node. And here am going to create a new RAW lvol on VM Host and that Raw lvol used as disk on VM Guest.
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
When you add or remove disks to the fabric, you can use any of the following four ways to force the Linux host to recognize these changes: 1. Reboot the host 2. Unload and reload the host adapter driver 3. Rescan the bus by echoing the /sys filesystem (only for Linux 2.6 kernels) ...
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
2. if it is in HP UX , the VG should be created with vgcreate -e option. Otherwise we need to modify the vg using vgmodify (still we required downtime for FS, concern is max_PE_per PV) 1. Add the new storage Disk to VG 2. Mirror the existing LVOLs 3. Once mirror done , Break the mirror ...
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
hbacmd - Utility is used to Manage the Emulex HBA card in linux server. We can down load this utility from Emulex support site. This is coming with HBAnyware utility kit. Its called one command manager tool. Installation steps: 1.Install the iocontrol module and then driver.
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
 
How to check HBA card status or Link? # grep -i "loop state" /proc/scsi/qla2xxx/"HBA adapter no" O/P will be like, [root@serverA qla2xxx]# grep -i "loop state" /proc/scsi/qla2xxx/5. Host adapter:loop state = , flags = 0x45a03 [root@serverA qla2xxx]# OR Use the systool command ...
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
 
Multipath config status check in Linux Using dmsetup command: # ls -lrt /dev/mapper //To View the Mapper disk paths and Lvols #dmsetup table #dmsetup ls #dmsetup status. Using Multipathd Command ( Daemon ) #echo 'show paths' |multipathd -k #echo 'show maps' |multipathd -k ...
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
How to rescan and add new Luns to server? Step 1: Get the list of HBA and exisiting disk details. #ls /sys/class/fc_host #fdisk -l 2>/dev/null | egrep '^Disk' | egrep -v 'dm-' | wc -l. Step 2: Scan the HBA ports (Need to scan all HBA port) #echo "1" > /sys/class/fc_host/host ??/issue_lip ...
1
Add a comment...

SYSADMIN SHARE changed his profile photo.

Shared publicly  - 
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
Finding orphaned RPMs on Linux Server If you use an RPM-based Linux distribution, you may have run into one or more cases were your system contains orphaned packages. An orphaned package is a package that doesn't have any packages that depend on it, and in a number of cases the package is no ...
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
A. To get List of HBA card installed on server : #lspci | grep -i fibre. B. To View used HBA ports on server: #ls -lrt /sys/class/fc_transport/ drwxr-xr-x 2 root root 0 May 27 09:40 target7:0:2 drwxr-xr-x 2 root root 0 May 27 09:40 target7:0:1 drwxr-xr-x 2 root root 0 May 27 09:40 target7:0:0 ...
1
Add a comment...

SYSADMIN SHARE

Shared publicly  - 
 
Linux Software raid : Disk status check / replace. A. Detecting a drive failure. Need to check the log ile /var/log/messages for disk related error . or check the RAID status in /proc/mdstat #cat /proc/mdstat. Note : If the out put displayed disk with [U_] then there is disk issue.
1
Add a comment...

SYSADMIN SHARE changed his profile photo.

Shared publicly  - 
1
Add a comment...
Basic Information
Gender
Male
Other names
SYSADMINSHARE
Links