From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Sigurd Karlsbakk Subject: Re: md RAID1 passes I/O errors to the filesystem despite having alive mirrors? Date: Sun, 17 Mar 2013 14:04:50 +0100 (CET) Message-ID: <1567316.0.1363525490131.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: Chris Murphy Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids > > This is correct, but I should note that I did not add it as > > write-mostly just > > because it's an older drive, but because it is my normal set-up for > > md3: > > a RAID1 mirror of a fast SSD (sdf) and a write-mostly HDD (sdg in > > this case). >=20 > Again, I find it odd that sdg while rebuilding is reading any sectors= =2E > The read errors are coming from sdg. That it's also write-mostly > enhances the mystery why sdg is being read from. >=20 > I would fail the HDD, and btrfs scrub the array which in effect shoul= d > scrub only sdf. And it may also need an offline btrfsck. The source > (sdf) is already suspect because of btrfs not finding checksums where > it was expecting to find them, and then on top of this you're getting > sdg producing bad sector errors on reads. Have you done a SMART check of sdg? smartctl -H first, then smartctl -t= short, then smartctl -t long (with smartctl -H between them) > You might also consider posting the configuration and full dmesg to > the btrfs list. I'm curious what btrfs developers think of this > configuration. It's not btrfs - it's below that. 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