Messages in this thread | | | Subject | Re: Quick question on Software RAID support. | Date | Wed, 13 Feb 2002 11:15:54 +0000 (GMT) | From | Alan Cox <> |
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> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Is it supposed to detect a failed disk and *stop* using it?
Yes, it will stop using it and if appropriate try and do a rebuild
> I had a raid1 IDE system, and it was continuosly raising hard errors on > hdc (the disk was dead, non just some bad blocks): the net result was that > it was unusable - too slow, too busy on IDE errors (a lot of them - even > syslog wasn't happy).
Don't try and do "hot pluggable" IDE raid it really doesn't work out. With scsi the impact of a sulking drive is minimal unless you get unlucky (I have here a failed SCSI SCA drive that hangs the entire bus merely by being present - I use it to terrify HA people 8))
> BTW, given a 2 disks IDE raid1 setup (hda / hdc), does it pay to put a > third disk in (say hdb) and configure it as "spare disk"? I've got > concerns about the slave not actually beeing able to operate if the > master (hda) fails badly.
Well placed concerns. I don't know what Andre thinks but IMHO spend the extra $20 to put an extra highpoint controller in the machine for the third IDE bus.
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