Hi,
On Tue, 11 Jan 2000 15:03:03 +0100, mauelsha
<[EMAIL PROTECTED]> said:
>> THIS IS EXPECTED. RAID-5 isn't proof against multiple failures, and the
>> only way you can get bitten by this failure mode is to have a system
>> failure and a disk failure at the same time.
> To try to avoid this kind of problem some brands do have additional
> logging (to disk which is slow for sure or to NVRAM) in place, which
> enables them to at least recognize the fault to avoid the
> reconstruction of invalid data or even enables them to recover the
> data by using redundant copies of it in NVRAM + logging information
> what could be written to the disks and what not.
Absolutely: the only way to avoid it is to make the data+parity updates
atomic, either in NVRAM or via transactions. I'm not aware of any
software RAID solutions which do such logging at the moment: do you know
of any?
--Stephen
