From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Fjellstrom Subject: Re: raid/device failure Date: Mon, 11 Feb 2013 02:13:53 -0700 Message-ID: <201302110213.53880.thomas@fjellstrom.ca> References: <23314523.6.1360571363962.JavaMail.root@zimbra> Reply-To: thomas@fjellstrom.ca Mime-Version: 1.0 Content-Type: Text/Plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <23314523.6.1360571363962.JavaMail.root@zimbra> Sender: linux-raid-owner@vger.kernel.org To: Roy Sigurd Karlsbakk Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On February 11, 2013, Roy Sigurd Karlsbakk wrote: > > I've re-configured my NAS box (still haven't put it into "productio= n") > > to be a > > raid5 over 7 2TB consumer seagate barracuda drives, and with some > > tweaking, performance was looking stellar. >=20 > Using that many drives in raid-5 is a bit risky. Better use raid-6=E2= =80=A6 >=20 > Just my 2c Yeah, I had first set it up in raid6. But I will have a separate backup= array=20 of this array. Nothing fancy, just a linear concat of some 3TB+1TB disk= s,=20 though it may eventually get upgraded to a raid5 of 3TB disks. I've figured that if I lose three disks all within the 5 hour time it t= akes to=20 do a full rebuild, I probably have larger problems to worry about than = losing=20 my collection of random linux isos, even more random downloaded files, = debian=20 apt mirror, one copy of my important backed up files, and miscelaneous = media=20 files. I'll be running with the bitmap enabled, so if there are minor=20 problems, the array will take minutes to resync rather than hours. Also, since I've gotten decent power supplies and UPSs, I haven't had v= ery=20 many issues with harddrives. I personally haven't had a drive failure t= hat=20 wasn't within the first couple weeks of purchase in years. And I always= try to=20 make sure to stress test disks before putting them into service to weed= out=20 SIDS. This way I get the 10TB+ I was aiming for when I decided to build a NAS= =2E In=20 raid6, I get 9.2TB or so. Very close I know ;) > Vennlige hilsener / Best regards >=20 > roy > -- > Roy Sigurd Karlsbakk > (+47) 98013356 > roy@karlsbakk.net > http://blogg.karlsbakk.net/ > GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt > -- > I all pedagogikk er det essensielt at pensum presenteres intelligibel= t. Det > er et element=C3=A6rt imperativ for alle pedagoger =C3=A5 unng=C3=A5 = eksessiv anvendelse > av idiomer med xenotyp etymologi. I de fleste tilfeller eksisterer > adekvate og relevante synonymer p=C3=A5 norsk. -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html --=20 Thomas Fjellstrom thomas@fjellstrom.ca -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html