Oh I agree, you shouldn�t depend only on a raid of mirror drives. The beauty of a mirror raid is when there is a failure, you don�t have any down time.
All key data on mirror raids should still be backed up. Mine are backed up on other HD�s once or twice a day automatically. But I�ve been running SoftRaid on an old Radius 81/110 with two 5GB SCSI drives (OS 8.6) for over 4 or 5 years without a problem. It runs Filemaker Server only and backs up twice daily to another server. Now that I told you this, this machine will probably die. You just can�t backup enough. Geno > From: <[EMAIL PROTECTED]> > Reply-To: G-List <[email protected]> > Date: Wed, 2 Feb 2005 19:44:21 EST > To: G-List <[email protected]> > Subject: Re: Hard Drives(raid) > > In a message [EMAIL PROTECTED] (Richard Starr) writes: > > << --- You wrote: > I run raids (1) in all our machines. > > I highly recommend raids to anyone who worries about data loss. With HD's > being so cheap there really isn't any reason not to. > --- end of quote --- > > So are you running raid to duplicate drives or extend them? I've considered > combining two 80 gig drives but I worry about whether it is less secure than > seperate. > > Is combining drives with raid pretty secure after all? Is a raid pair easy > to repair? > > Rich >> > > --------------------------- > > My reply: > > Security for RAID 1 (mirrored drives) in my experience is dependent on how > well they are set up. > > A couple of years ago I a setup a mirrored RAID on identical 9 GB SCSI hard > drives in my G3'd 7500 to secure my data in case one of the drives failed. > Both > drives were on the internal SCSI bus and I used Hard Disk Toolkit 4.0 (OS > 8.6) to configure the RAID. > > After a few months I had severe directory corruption in one drive. Since the > drives were mirrored the directory on the second drive was also corrupted. No > repair utilities I had could fix the corruption. I ended up initializing both > drives. Fortunately I had a third back up and little data was lost. > > Then a couple of months later the same thing happened again. Perhaps there > was a conflict, bug or problem with HDT 4.0 and my configuration -- don't know > but that ended my RAID 1 days. Too risky in my experience. > > Mirrored drives are great if you have a physical hard drive failure. All your > data should be accessible on the surviving drive. > > But with a severe directory failure they do not help (unless you can rebuilt > the directory). The same applies with any other file corruption. I find it > much more reliable to simply back up to a second drive daily. I takes very > little > time. And I still use third backup -- just in case. > > A quick Goggle search revealed this link for RAID definitions; better sites > probably exist. Perhaps a RAID 5 or 6 is more reliable but when you have to > buy all those extra drives and controllers. . .? > > Just my experience. --glen (digest mode). > > > > > -- > G-List is sponsored by <http://lowendmac.com/> and... > > Small Dog Electronics http://www.smalldog.com | Refurbished Drives | > -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > G-List list info: <http://lowendmac.com/lists/g-list.shtml> > --> AOL users, remove "mailto:"; > Send list messages to: <mailto:[email protected]> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For digest mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> > > iPod Accessories for Less > at 1-800-iPOD.COM > Fast Delivery, Low Price, Good Deal > www.1800ipod.com -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
