Am 27.10.2016 um 19:42 schrieb Paul:
Wolf K wrote:


But RAID cannot restore a compromised computer. It merely
stores two (or more) copies of the compromised system. NB
that RAID does have error correction, so it helps reduce
file corruption. But it can't protect against a
compromised system, because that is not necessarily the
same as file corruption.

To restore a system, one either repairs it, or replaces it
with an earlier, non-compromised version. That's why you
need a back-up scheme.

Have a good day,


Actually, there is one more failure mechanism.

Someone set up a RAID 1 mirror on a SIL3112.

Then, one day, one of the disks died. On a mirror,
the other disk immediately takes over and the user
can continue to work.

Well, on the SIL3112 in question, when the user
examined the Downloads folder, the latest file
on it was three months old. It turns out, the
driver *stopped mirroring* three months
before the failure! Three months worth of
downloads, saved files, were missing. The
only copy of them being on the dead hard drive.

Both funny and tragic. The notion of a mirror
that does not mirror. Who knew...


My friend told me a sad story, you and Wolf disclosed other
serious problems, so I have to confirm what I thought about
RAID after her story: NIMO! (Not in my office!)
Thank you for the confirmation.