How to resize iscsi volume in Linux

Submitted by root on Tue, 07/15/2014 - 09:53

Resize of iscsi device is pretty simple and the modification can be seen on linux client without reboot even.

Adding the iscsi disk can be done like in the example below:

root@pluto:~# iscsiadm -m discovery -t sendtargets -p 192.168.69.1
192.168.69.1:3260,1 iqn.2014-07.ro.gz.sun:backups
192.168.69.1:3260,1 iqn.2014-07.ro.gz.sun:swap-pluto
[color=green]192.168.69.1:3260,1 iqn.2014-07.ro.gz.sun:backups-file[/color]
root@pluto:~# iscsiadm -m node --login
Logging in to [iface: default, target: iqn.2014-07.ro.gz.sun:backups-file, portal: 192.168.69.1,3260] (multiple)
Login to [iface: default, target: iqn.2014-07.ro.gz.sun:backups-file, portal: 192.168.69.1,3260] successful.

With fdisk -l you can see the disk size and apparently it is kinda small:

root@pluto:~# fdisk -l /dev/sdd

Disk /dev/sdd: [color=red]367 MB[/color], 367001600 bytes
12 heads, 59 sectors/track, 1012 cylinders, total 716800 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk identifier: 0x00000000

Disk /dev/sdd doesn't contain a valid partition tabl

In this situation, you have to go back to storage machine (FreeNAS in my case) resize the iscsi device, and re-scan it on the linux client:

iscsiadm -m node --targetname iqn.2014-07.ro.gz.sun:backups-file -R

The output should be as follows:

root@pluto:~# iscsiadm -m node --targetname iqn.2014-07.ro.gz.sun:backups-file -R
Rescanning session [sid: 3, target: iqn.2014-07.ro.gz.sun:backups-file, portal: 192.168.69.1,3260]

Now, if we do again the fdisk command, iscsi disk should have the new size:

root@pluto:~# fdisk -l /dev/sdd
Disk /dev/sdd: [color=green]375.8 GB[/color], 375809638400 bytes
255 heads, 63 sectors/track, 45689 cylinders, total 734003200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk identifier: 0x00000000

Disk /dev/sdd doesn't contain a valid partition table

How to resize ISCSI in multipath:

Here you may need to umount your filesystem(s) unless you have mirroring and you can take off the mirrors one after another.

1. The size of the disk was initially 100G:

root@pluto:~# multipath -ll
oglebkp (33000000019d54e80) dm-10 FreeBSD,iSCSI Disk
size=[color=red]100G[/color] features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 4:0:0:0  sdf 8:80  active ready running
  `- 5:0:0:0  sdg 8:96  active ready running

2. Disconnect your ISCSI disks:

root@pluto:~# iscsiadm -m node --targetname iqn.2014-07.ro.gz.ogle:backups -u
Logging out of session [sid: 3, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.69.104,3260]
Logging out of session [sid: 4, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.70.104,3260]
Logout of [sid: 3, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.69.104,3260] successful.
Logout of [sid: 4, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.70.104,3260] successful.

3. Go to your storage (FreeNAS in my case) and resize the ISCSI devices:

4. Reattach the ISCSI devices:

root@pluto:~# iscsiadm -m node --login -p 192.168.69.104
Logging in to [iface: default, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.69.104,3260] (multiple)
Login to [iface: default, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.69.104,3260] successful.
root@pluto:~# iscsiadm -m node --login -p 192.168.70.104
Logging in to [iface: default, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.70.104,3260] (multiple)
Login to [iface: default, target: iqn.2014-07.ro.gz.ogle:backups, portal: 192.168.70.104,3260] successful.

Now you should see the new size on multipath command and fdisk of course:

root@pluto:~# multipath -ll
oglebkp (33000000019d54e80) dm-10 FreeBSD,iSCSI Disk
size=[color=green]200G[/color] features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 21:0:0:0 sdg 8:96  active ready running
  `- 20:0:0:0 sdf 8:80  active ready running

root@pluto:~# fdisk -l /dev/mapper/oglebkp

Disk /dev/mapper/oglebkp: [color=green]214.7 GB[/color], 214748364800 bytes
255 heads, 63 sectors/track, 26108 cylinders, total 419430400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk identifier: 0x00000000

              Device Boot      Start         End      Blocks   Id  System
/dev/mapper/oglebkp1              63   209715199   104857568+  a5  FreeBSD

If you do not see the new size, you may have to rescan your multipath device:

root@pluto:~# multipathd -k'resize map oglebkp'
ok

tmutil: command line interface into Time Machine root
macOS: tmutil set quota root
ESXi: how to change the MTU of vmkernek (vmk) interface (when UI fails) root
ESXi: A bunch of useful commands and information root
How to repair a sparsebundle image root
macOS: How to Show and Hide Hidden Files in macOS Finder root
Samsung 870 QVO 2TB: Speed Tests and comparison with Adata SU650 and Kingston K600 root
Ubiquiti EdgeRouter X - thoughts and tips root
Qnap TR-004 short review - why I cannot use it root
Speed test of Icy Box IB-3805-C31, a 5 disks enclosure from Raidsonic root
Asus ROG Sheath in 2024: a HUGE Mousepad, Bigger Than Logitech G840 XL root
Debian DRBD: How to resize drbd and OCFS2 online root
Ubuntu: Fast Install With VMware Fusion root
The one with APC Back-UPS BE850G2-GR: Charge Whatever With It, From Phone to Computer And BEYOND :D root
File Sharing Problems? Downgrade from macOS Ventura to Monterey root
VIOFO A139 Quad HD Dash Camera - 3 Channels Camera in a 2 Channels Package. Confused? root
CarPlay not working with iPhone 15 Pro? Seven Type C cables tested with Mazda 3 BP with USB-A Port root
Apple Watch Series 9? Not Yet! I Still Love My "Seven of Nine" 19 months later root
The Wooden Playhouse Project root
ESXi 7: Create VMFS Partition Via Command Line root
5 Months with iPhone 15 Pro: Not PERFECT But... Must See. From Gaming to ProRes Requirements. root
How to build a 25U 600x600 Server Rack root
Thermaltake Pure 20 fan - HUGE and quiet! root
Docker: how to increase php memory "the docker way" root
Mousepad Logitech G840 root
Global Chip Shortage? Build this oddity: PC From 2009 With GeForce GTX 1050ti 4G root
Brigadier: How to use it to Download Boot Camp Drivers root
Bombardier: How to use it to Download Boot Camp Drivers root
Logitech Pro X Wired Gaming Headset (2nd gen): review + mic test with G HUB on Windows 11 and macOS root
macOS: extract user's image root

#less tar.gz.ro

Stay at 127.0.0.1, wear a 255.255.255.0.

How to resize iscsi volume in Linux

Resize of iscsi device is pretty simple and the modification can be seen on linux client without reboot even.

Adding the iscsi disk can be done like in the example below:

With fdisk -l you can see the disk size and apparently it is kinda small:

In this situation, you have to go back to storage machine (FreeNAS in my case) resize the iscsi device, and re-scan it on the linux client:

The output should be as follows:

Now, if we do again the fdisk command, iscsi disk should have the new size:

How to resize ISCSI in multipath:

Here you may need to umount your filesystem(s) unless you have mirroring and you can take off the mirrors one after another.

1. The size of the disk was initially 100G:

2. Disconnect your ISCSI disks:

3. Go to your storage (FreeNAS in my case) and resize the ISCSI devices:

4. Reattach the ISCSI devices:

Now you should see the new size on multipath command and fdisk of course:

If you do not see the new size, you may have to rescan your multipath device:

Thou shalt not steal!

Recent content

Popular content

Today's:

All time:

Last viewed:

Syndicate

You are here

Resize of iscsi device is pretty simple and the modification can be seen on linux client without reboot even.

Adding the iscsi disk can be done like in the example below:

With fdisk -l you can see the disk size and apparently it is kinda small:

In this situation, you have to go back to storage machine (FreeNAS in my case) resize the iscsi device, and re-scan it on the linux client:

The output should be as follows:

Now, if we do again the fdisk command, iscsi disk should have the new size:

How to resize ISCSI in multipath:

Here you may need to umount your filesystem(s) unless you have mirroring and you can take off the mirrors one after another.

1. The size of the disk was initially 100G:

2. Disconnect your ISCSI disks:

3. Go to your storage (FreeNAS in my case) and resize the ISCSI devices:

4. Reattach the ISCSI devices:

Now you should see the new size on multipath command and fdisk of course:

If you do not see the new size, you may have to rescan your multipath device:

Thou shalt not steal!

Recent content

Search form

Syndicate