From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mikael Abrahamsson Subject: Re: seagate-"archive"-disks with raid6? Date: Sat, 13 Jun 2015 22:11:23 +0200 (CEST) Message-ID: References: <557C5330.1090605@gmail.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Return-path: In-Reply-To: <557C5330.1090605@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: wiebittewas Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Sat, 13 Jun 2015, wiebittewas wrote: > for a larger archive, we're thinking about buying six 8TB-Archive-Disks from Seagate to build a 4+2 Raid6-Array. > > now we've seen, that these disks are told not-recommended for raid, because they lack ERC/TLER (like many desktop-disks) Not only that. You might want to read: http://www.spinics.net/lists/linux-ide/msg50641.html These drives are different beasts than regular HDDs, and we seem to be seeing problems with them just the way SSDs were problematic in the beginning. So you might want to reconsider using SMR drives for RAID use. I was considering them until I read up on them, and then I decided it was too early in the deployment cycle to use them for RAID use. -- Mikael Abrahamsson email: swmike@swm.pp.se