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Upgrading Controllers firmware on a degraded RAID 5 array

Hi guys

I have been told that upgrading the controllers firmware on a degraded raid array can cause a loss of configuration. I have been doing this for over 1 year and it has never happened, it sounds more like a myth to me that anything else but i would like some advice on it, if possible.

Is it true that the RAID Configuration can be lost by upgrading the RAID Controller? In theory isnt the RAID configuration kept on the hard drives?

Thanks in advance,

Pedro

[495 byte] By [PedroManuelMartinsa] at [2007-11-27 4:05:24]
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# 1
I was under the impression that was the case. I think the DAC Stor is the name of that area on the drives. Anyone know if this isn't the case?
td_Z80a at 2007-7-12 9:10:22 > top of Java-index,Storage Forums,Storage General Discussion...
# 2

No - this is not a myth. It is entirely possible to lose access to the storage either temporarily or permanently.

It is extremely bad practice to upgrade any system with a degraded component no matter how small.

Which particular array have you been upgrading?

In most arrays, the configuration is saved on multiple disks - on some arrays as a n-way mirror where n is the number of disks in the tray. However unless you know exactly what the implications are, it is extremely important that firmware updates are not carried out on degraded arrays.

andrew-nessa at 2007-7-12 9:10:22 > top of Java-index,Storage Forums,Storage General Discussion...
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