topic Re: MSA1000 Survivability in MSA Storage

MSA1000 Survivability

Daniel Conroy — Thu, 12 May 2005 09:50:50 GMT

I have a MSA1000 with a single controller with battery backup and a single 2/8 fiber switch. If my controller fails, do I have any hope of recovering the disk configuration when the controller is replaced? Is the only option for true survivability a second controller?

Re: MSA1000 Survivability

Uwe Zessin — Thu, 12 May 2005 10:09:50 GMT

The configuration is stored on the disks, so you have a good chance that a replacement controller can pick it up.

Re: MSA1000 Survivability

Daniel Conroy — Thu, 12 May 2005 10:39:47 GMT

thank you.

Re: MSA1000 Survivability

CA1183745 — Fri, 13 May 2005 07:10:11 GMT

Daniel,
The MSA line of controllers feature a battery backed cache. If a controller fails and write caching has been enabled and there is any unflushed data in the cache, you can move the cache to a new controller and it will flush the data to the disks. The cache can survive at least 72 hours.
As Uwe stated, the configuration info is stored both in the controller and on the disks so you won't lose the configuration but if data is lost in the cache you may have corruption.

Glenn