From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Sigurd Karlsbakk Subject: Re: RAID5 recovering Date: Tue, 16 Apr 2013 18:41:43 +0200 (CEST) Message-ID: <8381772.6.1366130503769.JavaMail.root@zimbra> References: <20130416143035.43533168@natsu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20130416143035.43533168@natsu> Sender: linux-raid-owner@vger.kernel.org To: Roman Mamedov Cc: Pierre Martineau , linux-raid@vger.kernel.org, Robin Hill List-Id: linux-raid.ids > > Given the rebuild time for a 1To disk, I'd be wary of running RAID5 > > - if > > you have the space, adding another disk and going to RAID6 will be > > much > > safer. >=20 > As I see it, 3 disks is about the only configuration where RAID5 stil= l > does make sense. >=20 > 4 disks is a tricky spot, RAID5 already feels a bit too dangerous, bu= t > RAID6 is still not space-efficient enough. Given the fact that all data demands grow, the space-efficiency part is= temporary, so I wouldn't worry too much about it. Helped a friend to s= etup a RAID-5 and after her initial drive failure occured, gave her a t= ip on getting a new one in addition to the RMAed one. 4 drives in RAID-= 6 now, half a year after the initial failure, rock solid. If she gets a= double drive failure, well, the chances are good her data survives it. So yes, use RAID-6 if you can. Perhaps even with a spare if you've got = another drive and you don't need the extra space. Vennlige hilsener / Best regards 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 intelligibelt.= 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 tilf= eller eksisterer adekvate og relevante synonymer p=C3=A5 norsk. -- 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