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тАО05-12-2005 02:50 AM
тАО05-12-2005 02:50 AM
MSA1000 Survivability
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?
3 REPLIES 3
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тАО05-12-2005 03:09 AM
тАО05-12-2005 03:09 AM
Re: MSA1000 Survivability
The configuration is stored on the disks, so you have a good chance that a replacement controller can pick it up.
.
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тАО05-12-2005 03:39 AM
тАО05-12-2005 03:39 AM
Re: MSA1000 Survivability
thank you.
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тАО05-13-2005 12:10 AM
тАО05-13-2005 12:10 AM
Re: MSA1000 Survivability
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
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
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