From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Sigurd Karlsbakk Subject: Re: Raid 5/10 discard support broken in 3.8.2 Date: Thu, 7 Mar 2013 19:26:17 +0100 (CET) Message-ID: <6351179.18.1362680777332.JavaMail.root@zimbra> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Dave Cundiff Cc: Linux MDADM Raid List-Id: linux-raid.ids > > I'm not sure if TRIM/UNMAP is supported on that controller, even in > > HBA mode (and with IT firmware). I've also seen scterc fail to work > > on that controller as well, while working with an ordinary "stupid" > > controller on the same disk. > > >=20 > I had heard that as well. I believe it may have been only older > firmware or maybe just people trying to TRIM against a RAID. I'm > running recent firmware and it appears to execute the command > correctly against a single disk. >=20 > [root@a2simage:etc]$ mkfs.ext4 /dev/sda3 > mke2fs 1.41.12 (17-May-2010) > Discarding device blocks: ^C825792/54624256 >=20 >=20 > Mar 7 11:53:08 66 kernel: sd 0:0:0:0: [sda] Send: > Mar 7 11:53:08 66 kernel: 0xffff8805edd86c80 > Mar 7 11:53:08 66 kernel: sd 0:0:0:0: [sda] CDB: > Mar 7 11:53:08 66 kernel: Unmap/Read sub-channel: 42 00 00 00 00 00 0= 0 > 00 18 00 > Mar 7 11:53:08 66 kernel: buffer =3D 0xffff88062fe4a280, bufflen =3D = 24, > queuecommand 0xffffffffa01d27e0 Could it be as simple as the controller trying to send UNMAP to an (S)A= TA device? TRIM and UNMAP are different commands for ATA and SCSI, resp= ectively. 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