Path: csiph.com!x330-a1.tempe.blueboxinc.net!feeder1.hal-mli.net!nx02.iad01.newshosting.com!newshosting.com!novia!news-out.readnews.com!transit4.readnews.com!panix!panix.com!forkosh From: JohnF Newsgroups: comp.os.linux.misc Subject: Re: Data Recovery from Nas Acer NS04 Date: Thu, 14 Apr 2011 13:03:19 +0000 (UTC) Organization: PANIX Public Access Internet and UNIX, NYC Lines: 33 Message-ID: References: <8bb3e138-de1f-4283-a215-805b75a2aecb@r6g2000vbz.googlegroups.com> <5crcq61ktl6e1ju7s9facuqsj8qlp4lu2g@4ax.com> NNTP-Posting-Host: panix3.panix.com X-Trace: reader1.panix.com 1302786199 23314 166.84.1.3 (14 Apr 2011 13:03:19 GMT) X-Complaints-To: abuse@panix.com NNTP-Posting-Date: Thu, 14 Apr 2011 13:03:19 +0000 (UTC) User-Agent: tin/1.8.3-20070201 ("Scotasay") (UNIX) (NetBSD/5.1 (i386)) Xref: x330-a1.tempe.blueboxinc.net comp.os.linux.misc:717 Grant wrote: > davidecool wrote: > >>this post is my last chance to recover data from a raid. > > Usual answer is to restore from backup, > Not helpful when the RAID is your backup though, Yeah, most people seem to confuse raid with a backup solution when it's really an availability solution. Anything that's powered up and spinning isn't a backup. I have three one-disk nas's (synology ds109j's) on my soho lan, each one backing up all four of my pc's (and a few old digital vaxstations and an alphaserver). Costs less than one two-disk nas raid. Usually only one nas is powered up at a time, in rotation, except for occasional syncs when something looks weird. If one disk and/or chasis dies, at very most a day's work dies with it. Raid just scares me as backup. Especially if the controller dies, then depending on raid level, it can be hard to make sense of the disks without an identical duplicate controller. My disks are all just ext3, easily mountable on any linux box. In fact, I have a Thermaltake BlacX duet just for that purpose in case of trouble. Raid, I think, is just the wrong way to go for most typical soho-type backup requirements. You might want a raid on your lan for availability purposes, so everybody keeps working in case a single spindle dies. But you want a whole different (most likely non-raid) backup solution, whether or not you have an online raid for availablity. -- John Forkosh ( mailto: j@f.com where j=john and f=forkosh )