virtual grind thoughts from the virtual world

10Nov/121

Reset Equallogic Member To Default Settings

In our lab environments, we are constantly using Equallogic members for various purposes. Sometimes, it is easier to simply reset an array and initialize it for quick use.

To reset an array to factory defaults, simply ssh in to the IP address of one of the network interfaces on your array and enter the reset command.

GROUPNAME> reset
Reset this array to factory defaults? [n/DeleteAllMyDataNow] DeleteAllMyDataNow

Note that the array makes sure you want to reset the configuration by making you type in "DeleteAllMyDataNow".

10Nov/120

Quickly Reset Equallogic Group Membership Password

I have run in to situations where I need to add new Equallogic members to groups that did not have the password documented. On an initial group configuration, settings such as group IP, grpadmin password, and membership password are chosen. Unfortunately, there is not an easy way to recover or see the membership password via the Group Manager.

Anyway, you can safely change the password to something new and NOT affect any existing settings to get a new member in.

To do this, simply ssh in to your group IP, and issue the grpparams and passwd commands:

GROUPNAME>grpparams
GROUPNAME>passwd
Password for adding members: 1234
Retype password: 1234
Password change succeeded.

21Feb/120

Clearing Equallogic Lost Raid Blocks

When there are issues with a lost block condition on a RAID volume on an Equallogic member, you may receive a "RAIDset lost blocks error" via the Group Manager or via an email/smtp message.

To get more info on the lost block(s), simply ssh in to an IP address of the member with the error and issue the following commands:

su exec 'raidtool'

Look for an error similar to *!! RAID LUN contains 8 lost blocks. !!* in the output:

RAID LUN 1 Ok.
*!! RAID LUN contains 8 lost blocks. !!*
(raidtool -W 1) clears blocks.
(raidtool -w 1) lists blocks.
14 Drives (14,15,16,46,18,19,20,21,22,23,24,25,26,27)
RAID 50 (64KB sectPerSU)
Capacity 23,489,351,516,160 bytes

In this example, we see that LUN 1 contains 8 bad blocks. To list the the bad blocks, we will use a -w (followed by LUN number) switch in the raidtool utility and to clear the lost blocks, we will use the -W (followed by LUN number).

List bad blocks:

su exec 'raidtool -w 1'

Clear bad blocks:

su exec 'raidtool -W 1'

11Jul/116

Restarting the Equallogic Group Manager Interface

I have run in to a few occasions over the last couple of years where the Equallogic Group Manager interface stops responding. Usually, the statistics will start to fail or the login page is simply inaccessible.

To remedy this, you can restart the UI, with the following command via the CLI:

eqlinit restart-snap netmgtd

Please note that this does not restart your array, just the management interface.

23Jun/110

Accessing the bash shell in Equallogic

Sometimes I need tools such as traceroute when troubleshooting connectivity between Equallogic arrays. This is especially useful when configuring features like replication.

From the main Equallogic shell, only certain Equallogic specific commands are available. To access the OS level shell, you can simply ssh in to your array and issue the command:

su exec bash

From the bash shell, you can issue OS level commands such as ifconifg and traceroute.

12Jun/110

Setting Default Path Selection Policy (PSP) – Round Robin

When using a storage technology such as Compellent, the ability to take advantage of multipathing is highly desirable. To utilize multipathing you must select the correct Path Selection Policy (PSP) on each ESX/ESXi host.

By default, the "Fixed (VMware)" path selection policy is selected on a new ESX/ESXi install. As you add volumes across multiple hosts in a cluster, this become a pain to change the path selection to "Round Robin (VMware)" on each volume on each host.

Fortunately, changing the default PSP is very easy with the following esxcli command:

esxcli nmp satp setdefaultpsp --satp="VMW_SATP_DEFAULT_AA" --psp="VMW_PSP_RR"

Please note that you want to first verify your "Storage Array Type" before setting the above policy. For Compellent, as of this post, the storage array type is "VMW_SATP_DEFAULT_AA". Other vendors may require a different type, such as "VMW_SATP_EVA" or "VMW_SATP_EQL".

4Jun/112

Quickly Determine An Equallogic Group Lead

When updating firmware (amongst other things) if you quickly need to check which member in a group is the lead, you can do so with the command:

su exec pm member

Simply ssh in to your group IP address or one of the specific member IP addresses and issue the command. Note that this command will also show you some useful statistics as well.

An example of the output from this command is below:

MEMBER-NAME-HERE [1.1447322343] 0-888888-999999-000000 pssId(4) Talisker(10)
total space : 1476818 pages 21633.08GB RAID-5
free space : 39861 pages 583.90GB (3%)
snap space : 0 pages 0.00MB (0%)
repl space : 9490 pages 139.01GB (1%)
status: (Online GL)

GL-group lead, RV-raid verification, BC-battery charging, RR-raid reconstruction

As you can see, some basic stats on the space is presented. In the "status" line, you also see that the member is online and that it contains "GL", which means it is currently the group lead. Via the legend at the bottom, you can also see that there is a possible GL, RV, BC, and RR status on the member as well.

18May/110

Veeam Community Podcast – Episode 19

I recently chatted with Rick Vanover regarding some unique cloud designs. We also discussed some topics around the current status of cloud based deployments, as we see as a cloud computing service provider.

Link:
Episode 19 – Cloud computing with iland

28Mar/110

Link To vSphere 4.0 iSCSI SAN Configuration Guide

When working with iSCSI arrays, this guide is worth gold.

Get the guide here.

11Dec/103

Equallogic Firmware Upgrade Fails With Error Regarding Free Space

I have run in to this situation a few times when upgrading Equallogic firmware. This error means there is not enough space in the directory used for firmware files. This usually means there are troubleshooting files (.dgo) or old firmware files hanging out in this directory. Although the .dgo files are small in size, it could still prevent the update from happening because of needed space.

To remedy the issue, simply ftp in to the IP address of one of the member's network interfaces and list the contents of the directory with the 'ls' command. From here, you will see a list of files in the directory. Firmware update files end in .tgz and if there are older firmware files in there besides the version you are trying to upgrade to, you can simply delete it with the 'del' command, or:

del kit_V4.3.5-R115269_2153195738.tgz (Old firmware update packages)
or
del SegXX.dgo (Troubleshooting files)

From here, simply try to update again using telnet/ssh or the Group Manager and you should be set. I personally like doing upgrades via ssh, there is a lot more diagnostic output that you see in the CLI vs the Group Manager.

Filed under: Equallogic 3 Comments