So I'm getting a bunch of Dell PERC 6i/R RAID cards for some Dell servers.
Now I know that some RAID cards come with a little battery (BBU or TBBU) to save the write cache in case there is a power loss to the machine. I understand that there can be corruption if the machine shuts down during a write.
My question is then, why do RAID cards without batteries even exist if this is such a dangerous problem? Why would anyone use a RAID card without a battery? There seem to be a lot of them around, so what exactly is the application when a RAID card without a battery is fine?
None of these servers will be general file servers... they are email servers, domain servers, inventory/ordering server (so that is a small database), etc.
Last question, I've heard that SSD drives change the necessity for a RAID battery since they have larger write caches?
Now I know that some RAID cards come with a little battery (BBU or TBBU) to save the write cache in case there is a power loss to the machine. I understand that there can be corruption if the machine shuts down during a write.
My question is then, why do RAID cards without batteries even exist if this is such a dangerous problem? Why would anyone use a RAID card without a battery? There seem to be a lot of them around, so what exactly is the application when a RAID card without a battery is fine?
None of these servers will be general file servers... they are email servers, domain servers, inventory/ordering server (so that is a small database), etc.
Last question, I've heard that SSD drives change the necessity for a RAID battery since they have larger write caches?