As a VMUG leader and a double VCDX I have seen one technology trend only increase over the years. It’s the number of storage vendors! Last year at our VMUG UserCon every sponsor looking for[…]
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Category: Storage
Brocade Zoning via Scripting for FOS 7
About four years ago I wrote about how to do fiber channel zoning on Brocade switches using scripts. The CLI on brocade is really feature rich but not super documented… most people use the[…]
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How does storage multipathing work?
Every week I spend some time answering questions on the vmware forums. It also provides me great idea’s for blog posts just like this one. It started with a simple question how does multipathing[…]
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VMware Lost access to volume on Brocade SAN switches
Earlier today I ran across the following errors in my ESXi logs:
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Nov 15 08:03:10 esx02 Hostd: [6BA33B90 info 'Vimsvc.ha-eventmgr'] Event 305408 : Lost access to volume 51f7bd04-ace1a4c9-0114-0017a4770000 (LUN23) due to connectivity issues. Recovery attempt is in progress and outcome will be reported shortly. |
It would always recover right away within 1 second and since I am on a Active/Active array it was not really an[…]
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Lock down port speed on a brocade switch
Well this one is pretty simple and a lot of vendors still want the port speeds locked down. So first of all use switchshow To show the current speed then use portcfggport port#[…]
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Upgrade the firmware on a brocade switch
Yep I love doing this…. it’s really easy as long as you have an FTP server or run ftp on your desktop and have firewalls allowed… The brocade switch needs to be able to[…]
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Boot From SAN, multipath.conf and initrd
At work almost everything I run boots from SAN. This allows flexability when hardware problems arise. It does cause one issue, when moving storage systems how do you move your boot from san luns. Well[…]
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Troubleshooting multipathd
At work I used linux native multipathing MPIO provided via device mapper a lot. I can be a bit hard to troubleshoot. I have found the best way is to use the interactive console. From[…]
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Brocade Fiber Switches Clear stats
Well time to gather stats and clear them again.. log into your brocade switch via ssh and type the following command:
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portStatsClear |
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portLogClear |
To see the stats you can run:
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portErrShow |
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portLogShow |
I will be[…]
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How to find the model and manufacturer of your scsi devices
In linux this is an easy process to see everything type: For vendor
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cat /sys/block/sd*/device/vendor For model cat /sys/block/sd*/device/model For individual like sda cat /sys/block/sda/device/model |
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