Re: Filesystem will remount read-only
On Fri, Sep 16, 2016 at 6:08 PM, Chris Murphywrote: > > If -o recovery doesn't work, you'll need to use something newer, you > could use one of: > > Fedora Rawhide nightly with 4.8rc6 kernel and btrfs-progs 4.7.2. This > is a small netinstall image. dd to a USB stick, choose Troubleshooting > option, then the Rescue option, then after startup use the 3 option to > get to a shell where you can try to mount normally, or use > btrfs-check. Limited tty, no sshd. > https://kojipkgs.fedoraproject.org/compose/rawhide/Fedora-Rawhide-20160914.n.0/compose/Everything/x86_64/iso/Fedora-Everything-netinst-x86_64-Rawhide-20160914.n.0.iso.n.0.iso > > Or something more official with published hash's for the image and a > GUI, Fedora 24 workstation has kernel 4.5.5 and btrfs-progs 4.5.2 > https://getfedora.org/en/workstation/download/ Just to complete the thought... use these just to boot and have access to something newer. I'm not suggesting install them. First try a normal mount, and if that fails, try -o recovery, if that fails, I'm curious about btrfs rescue super-recover -v btrfs check What I'm after is a way to get it to mount cleanly with a new kernel, and then hoping you can then just reboot with the ancient kernel and it'll be back to normal. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Filesystem will remount read-only
On Fri, Sep 16, 2016 at 8:57 AM, Jeffrey Michelswrote: > Hello, > > I have a system that has been in production for a few years. The SAN the VM > was running on had a hardware failure about a month ago and now one of the > two btrfs filesystems will remount after boot read-only. Here is the system > information: > > uname -a > > Linux retain 3.0.101-0.47.71-default #1 SMP Thu Nov 12 12:22:22 UTC 2015 > (b5b212e) x86_64 x86_64 x86_64 GNU/Linux > > Btrfs --version > > Btrfs v0.20+ Impressive that it's been running in production this long and with old kernel. I like it! Anyway, you could try mounting with -o recovery and see if that works. That's about the only thing I'd trust with such an old kernel and btrfs-progs. I don't even think it's worth trying the btrfsck on v0.20 just to see what the problems might be, and certainly not for actually using the repair mode. Actually I'm not even sure progs that old even does repairs, it might be the era of notify only. If -o recovery doesn't work, you'll need to use something newer, you could use one of: Fedora Rawhide nightly with 4.8rc6 kernel and btrfs-progs 4.7.2. This is a small netinstall image. dd to a USB stick, choose Troubleshooting option, then the Rescue option, then after startup use the 3 option to get to a shell where you can try to mount normally, or use btrfs-check. Limited tty, no sshd. https://kojipkgs.fedoraproject.org/compose/rawhide/Fedora-Rawhide-20160914.n.0/compose/Everything/x86_64/iso/Fedora-Everything-netinst-x86_64-Rawhide-20160914.n.0.iso.n.0.iso Or something more official with published hash's for the image and a GUI, Fedora 24 workstation has kernel 4.5.5 and btrfs-progs 4.5.2 https://getfedora.org/en/workstation/download/ -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Filesystem will remount read-only
Jeffrey Michels posted on Fri, 16 Sep 2016 14:57:43 + as excerpted: > Hello, > > I have a system that has been in production for a few years. The SAN > the VM was running on had a hardware failure about a month ago and now > one of the two btrfs filesystems will remount after boot read-only. > Here is the system information: > > uname -a > > Linux retain 3.0.101-0.47.71-default #1 SMP Thu Nov 12 12:22:22 UTC 2015 > (b5b212e) x86_64 x86_64 x86_64 GNU/Linux > > Btrfs --version > > Btrfs v0.20+ That is positively /ancient/, both kernel and userspace (btrfs-progs). Keep in mind that btrfs was still considered very experimental back then, with the experimental labels coming off only with 3.14 or there abouts, IIRC (userspace releases got version-synced with kernelspace in 3.12, so 3.14 applies to both). So you have been running an at-the-time still extremely experimental filesystem for years now, and it's only now coming up with problems that need fixed. Pretty remarkable for the experimental state back then, but it doesn't change the fact that it /was/ "may eat your data and burn your kids alive as a sacrifice to appease the filesystem gods" level experimental, with the according warnings, back then. So first thing I'd suggest is to update to kernel 4.4 LTS series, and something similar for btrfs-progs userspace. Then, given the age and experimental nature of the filesystem back then, I'd kill the filesystems and do a fresh mkfs.btrfs, restoring from backups. That way you're starting with a well tested and stable LTS kernel that is both reasonably mature already, and will be supported for some time to come, and eliminate any possibility of long fixed and forgotten bugs coming back to bite you years later. Alternatively, if you're using a long-term support distro, you have the choice of going to them for that support, since unlike this list which focuses on the state going forward, that sort of deep long-term support of long outdated versions is a good part of the reason such distros exist, and a good part of why a lot of people are willing to pay sometimes rather sizable sums of money /for/ that level of support. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Filesystem will remount read-only
Hello, I have a system that has been in production for a few years. The SAN the VM was running on had a hardware failure about a month ago and now one of the two btrfs filesystems will remount after boot read-only. Here is the system information: uname -a Linux retain 3.0.101-0.47.71-default #1 SMP Thu Nov 12 12:22:22 UTC 2015 (b5b212e) x86_64 x86_64 x86_64 GNU/Linux Btrfs --version Btrfs v0.20+ Btrfs fi show Label: none uuid: f1e23038-22c1-44b2-8cf8-a3ca6363d2f4 Total devices 1 FS bytes used 303.01GiB devid1 size 1024.00GiB used 351.04GiB path /dev/dm-2 Label: none uuid: 85e58f4e-ce56-4b11-9ed9-16abeead8863 Total devices 1 FS bytes used 83.83GiB devid1 size 149.49GiB used 101.49GiB path /dev/dm-0 Btrfs v0.20+ Btrfs fi df /retain Data: total=261.01GiB, used=259.23GiB System, DUP: total=8.00MiB, used=40.00KiB System: total=4.00MiB, used=0.00 Metadata, DUP: total=45.00GiB, used=43.77GiB Metadata: total=8.00MiB, used=0.00 Dmesg--Can provide the full output if needed via attachment. Here is where the fs remounts read-only: [ 55.181245] btrfs: parent transid verify failed on 153295646720 wanted 230487 found 230484 [ 55.187980] btrfs: parent transid verify failed on 153295646720 wanted 230487 found 230484 [ 55.187991] BTRFS debug (device dm-2): run_one_delayed_ref returned -5 [ 55.187994] [ cut here ] [ 55.188021] WARNING: at /usr/src/packages/BUILD/kernel-default-3.0.101/linux-3.0/fs/btrfs/super.c:255 __btrfs_abort_transaction+0x60/0x170 [btrfs]() [ 55.188024] Hardware name: VMware Virtual Platform [ 55.188026] btrfs: Transaction aborted (error -5) [ 55.188028] Modules linked in: acpiphp microcode fuse xfs ext3 jbd mbcache loop sr_mod ppdev vmw_balloon(X) i2c_piix4 intel_agp pciehp ipv6_lib cdrom parport_pc shpchp parport rtc_cmos intel_gtt pci_hotplug floppy i2c_core sg container ac mptctl serio_raw button pcspkr btrfs zlib_deflate crc32c libcrc32c dm_mirror dm_region_hash dm_log linear sd_mod crc_t10dif processor thermal_sys hwmon scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_dh dm_snapshot dm_mod vmw_pvscsi vmxnet3 ata_generic ata_piix libata mptspi mptscsih mptbase scsi_transport_spi scsi_mod [ 55.188071] Supported: Yes, External [ 55.188075] Pid: 1985, comm: sync Tainted: G X 3.0.101-0.47.71-default #1 [ 55.188077] Call Trace: [ 55.188090] [] dump_trace+0x75/0x300 [ 55.188097] [] dump_stack+0x69/0x6f [ 55.188104] [] warn_slowpath_common+0x87/0xe0 [ 55.188109] [] warn_slowpath_fmt+0x45/0x60 [ 55.188125] [] __btrfs_abort_transaction+0x60/0x170 [btrfs] [ 55.188152] [] btrfs_run_delayed_refs+0x3a6/0x520 [btrfs] [ 55.188192] [] btrfs_commit_transaction+0x42e/0xa00 [btrfs] [ 55.188228] [] __sync_filesystem+0x62/0xb0 [ 55.188234] [] iterate_supers+0x6a/0xc0 [ 55.188239] [] sys_sync+0x52/0x80 [ 55.188244] [] system_call_fastpath+0x16/0x1b [ 55.188251] [<7f45758cafc7>] 0x7f45758cafc6 [ 55.188253] ---[ end trace c5a604849514ffcd ]--- [ 55.188257] BTRFS error (device dm-2) in btrfs_run_delayed_refs:2688: errno=-5 IO failure [ 55.188259] BTRFS info (device dm-2): forced readonly [ 55.188263] BTRFS warning (device dm-2): Skipping commit of aborted transaction. [ 55.188266] BTRFS error (device dm-2) in cleanup_transaction:1538: errno=-5 IO failure Thank you for your assistance, Jeff Michels iCon 2017 Registration is Now Open! Agents of Innovation March 8 - 10, 2017 TradeWinds Island Resort, St. Pete Beach, Florida Register today at: www.skyward.com/icon PRIVILEGED AND CONFIDENTIAL Skyward Communication This is a transmission from Skyward, Inc. and may contain information which is privileged, confidential, and protected by service work privileges. The response is in direct relationship to the information provided to Skyward. If you are not the addressee, note that any disclosure, copying, distribution, or use of the contents of this message is prohibited. If you have received this transmission in error, please destroy it and notify us immediately at 715-341-9406. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html