iSCSI Add-Remove Disk

/sbin/iscsiadm -m discovery -d 5 -t st -p 10.1.1.1:3260 

/sbin/iscsiadm -m node --interface=eth<device number> -T < iqn name > --login

might need a ...  /sbin/iscsiadm -m iface -I eth1 --op=new


/sbin/fdisk -l |grep sd |grep -v grep

Disk /dev/sda: 107.4 GB, 107374182400 bytes
/dev/sda1   *           1          26      204800   83  Linux
/dev/sda2              26        1070     8388608   82  Linux swap / Solaris
/dev/sda3            1070       13055    96263168   83  Linux
Disk /dev/sdb: 1099.5 GB, 1099526307840 bytes
/dev/sdb1               1      133677  1073756159+  8e  Linux LVM
Disk /dev/sdc: 2199.0 GB, 2199036887040 bytes

pvcreate /dev/sdc

  Writing physical volume data to disk "/dev/sdc"
  Physical volume "/dev/sdc" successfully created

vgextend VolGroup01 /dev/sdc

  Volume group "VolGroup01" successfully extended

root # pvmove /dev/sdb /dev/sdc
  ...
  /dev/sdb: Moved: 99.8%
  /dev/sdb: Moved: 100.0%

  /dev/sdb: Moved: 0.0%
  ...
  /dev/sdb: Moved: 99.8%
  /dev/sdb: Moved: 100.0%

pvscan

  PV /dev/sdb    VG VolGroup01   lvm2 [250.00 GB / 250.00 GB free]
  PV /dev/sdc    VG VolGroup01   lvm2 [350.01 GB / 105.01 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [31.88 GB / 0    free]
  Total: 3 [631.89 GB] / in use: 3 [631.89 GB] / in no VG: 0 [0   ] 
 
vgreduce VolGroup01 /dev/sdb

  Removed "/dev/sdb" from volume group "VolGroup01"
pvscan
  PV /dev/sdc    VG VolGroup01      lvm2 [350.01 GB / 105.01 GB free]
  PV /dev/sda2   VG VolGroup00      lvm2 [31.88 GB / 0    free]
  PV /dev/sdb                       lvm2 [250.00 GB]
Total: 3 [631.89 GB] / in use: 2 [381.88 GB] / in no VG: 1 [250.00 GB]

lvextend -L+50G /dev/mapper/VolGroup01-U02

    Extending logical volume U02 to 205.00 GB
    Logical volume U02 successfully resized

resize2fs /dev/mapper/VolGroup01-U02

resize2fs 1.39 (29-May-2006)
Filesystem at /dev/mapper/VolGroup01-U02 is mounted on /u02; on-line resizing required
Performing an on-line resize of /dev/mapper/VolGroup01-U02 to 53739520 (4k) blocks.
The filesystem on /dev/mapper/VolGroup01-U02 is now 53739520 blocks long.

df -h

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       22G   15G  6.1G  70% /
/dev/sda1              99M   30M   65M  32% /boot
tmpfs                 8.0G  4.0G  4.1G  49% /dev/shm
/dev/mapper/VolGroup01-U01
                       35G   30G  3.7G  89% /u01
/dev/mapper/VolGroup01-U02
                      202G  134G   59G  70% /u02
/dev/mapper/VolGroup01-U03
                      9.9G  172M  9.2G   2% /u03
/dev/mapper/VolGroup01-L01
                      5.0G  1.4G  3.4G  29% /l01
/dev/mapper/VolGroup01-L02
                      5.0G  1.4G  3.4G  29% /l02
/dev/mapper/VolGroup01-L05
                       35G   15G   18G  47% /l05

pvscan

  PV /dev/sdc    VG VolGroup01      lvm2 [350.01 GB / 55.01 GB free]
  PV /dev/sda2   VG VolGroup00      lvm2 [31.88 GB / 0    free]
  PV /dev/sdb                       lvm2 [250.00 GB]
  Total: 3 [631.89 GB] / in use: 2 [381.88 GB] / in no VG: 1 [250.00 GB]

iscsiadm -m node --targetname iqn.2001-05.com.equallogic:0-8a0906-3bf6a1106-f3a3c7406054cbdc-rehl5-3 -p 10.1.1.1:3260 --logout

Logging out of session [sid: 1, target: iqn.2001-05.com.equallogic:0-8a0906-3bf6a1106-f3a3c7406054cbdc-rehl5-3, portal: 10.1.1.1,3260]
Logout of [sid: 1, target: iqn.2001-05.com.equallogic:0-8a0906-3bf6a1106-f3a3c7406054cbdc-rehl5-3, portal: 10.1.1.1,3260] successful.

iscsiadm -m session -R


Extend a LVM Root partition


pvscan
vgscan
fdisk -l
vgextend grafana-vg /dev/sda5 
lvextend -l +100%FREE /dev/mapper/grafana--vg-root
df -h
fdisk -l
resize2fs /dev/mapper/grafana--vg-root




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