JFS root file system will only mount read-only

Hi, everybody!
I have been running this filesystem for months with no issues. The only thing I can think of that I changed recently was that I ran pacman -Syu.
When I boot there is no indication that there are errors with the file system. It simply mounts as read-only.
I have tried running
mount -n -o remount,rw /
, and it says "mount: / not mounted already, or bad option".
When I run just
mount -n -o rw /
it appears to work, in that there is no error message, but the file system is still read-only.
I have been able to mount it read-write successfully with the install disc, but only after I ran a fsck on it, also from the install disc. However, each time I have run fsck, it has reported no errors. I also tried forcing the check, with the same result.
Even after mounting it successfully with the install disc, it still will not mount read-write from my hard-disk install.
My DE (gnome) locked up a few days ago and I had to do a hard reboot, but it still functioned fine after that, so it doesn't seem related.
I would like to not have to reinstall, but I can if I need to. I would also like to find out how this happened, so that it does not happen again.
Any suggestions would be greatly appreciated.
Thanks for your help,
Jefferson

I got it working. I was running the fsck on the wrong partition. I am still curious as to why it happened, though.
@Marcel-: I don't think there was anything strange in my logs, but I'm not sure. I will look them over some more. Is there a particular one I should be looking in?
@seiichiro0185: Yes, the passno-flag is set to 1 for my rootfs.
Thank you both very much for helping me!

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  • Zerofree: Shrinking ARCH guest VMDK--'remount the root file-system'?

    Hi!
    [using ZEROFREE]
    Getting great results with and extra ARCH install running as a VMDK in Workstation.
    REALLY need tips on shrinking the VMDK. obviously have deleted unneeded files
    and now rather urgently need to learn what's eluding me so far.
    1) zerofree is install IN the virtual machine (VMDK)workstation  running on windows 8.
    2) Here's the instructions for zerofree:
           filesystem has to be unmounted or mounted  read-only  for  zerofree  to
           work.  It  will exit with an error message if the filesystem is mounted
           writable.
           To remount the  root  file-system  readonly,  you  can  first
           switch to single user runlevel (telinit 1) then use mount -o remount,ro
           filesystem.
    As it a VMDK and it's running would the only/best option be to: "remount the  root  file-system  readonly" ??
    OR, could i add the VMDK to another running arch system that I do have and NOT mount the VMachine thereby
    allowing zero free to run even better on that?
    Are both method JUST as efficive at shrinking? My guess would be the remount root file-system as read only
    would NOT be as efficient at shrinking.
    I could really use a brief walk-through on this as all attempts have failed so far.
    I boot the ARCH virtual machine and do what may I ask?
    Last edited by tweed (2012-06-05 07:43:41)

    How did you use/test unison? In my case, unison, of course, is used in the cpio image, where there are no cache files, because unison has not been run yet in the initcpio image, before it had a chance to be used during boot time, to generate them; and during start up is when it is used; when it creates the archives. ...a circular dependency. Yet, files changed by the user would still need to be traversed to detect changes. So, I think that even providing pre-made cache files would not guarantee that they would be valid at start up, for all configurations of installation. -- I think, though, that these cache files could be copied/saved from the initcpio image to the root (disk and RAM), after they have been created, and used next time by copying them in the initcpio image during each start up. I think $HOME would need to be set.
    Unison was not using any cache previously anyway. I was aware of that, but I wanted to prove it by deleting any cache files remaining.
    Unison, actually, was slower (4 minutes) the first time it ran in the VM, compared to the physical hardware (3:10s). I have not measured the time for its subsequent runs, but It seemed that it was faster after the first run. The VM was hosted on a newer machine than what I have used so far: the VM host has an i3-3227U at 1.9 GHz CPU with 2 cores/4 threads and 8 GB of RAM (4 GB ware dedicated to the VM); my hardware has a Pentium B940 at 2 GHz CPU with 2 cores/2 threads and 4 GB of RAM.
    I could see that, in the VM, rsync and cp were copying faster than on my hardware; they were scrolling quicker.
    Grub, initially complains that there is no image, and shows a "Press any key to continue" message; if you continue, the kernel panics.
    I'll try using "poll_device()". What arguments does it need? More than just the device; also the number of seconds to wait?
    Last edited by AGT (2014-05-20 16:49:35)

  • A bad scare: root file system recovery [SOLVED]

    Hi, everybody,
    The trouble began with an odd message: KDE Daemon: new storage detected (hard disk): open in a new window, ignore. Unfortunately, the hard disk in question is statically mounted via /etc/fstab; should have been mounted all along.
    # /etc/fstab: static file system information
    # <file system> <dir> <type> <options> <dump> <pass>
    none /dev/pts devpts defaults 0 0
    none /dev/shm tmpfs defaults 0 0
    /dev/cdrom /mnt/cdrom iso9660 ro,user,noauto,unhide,iocharset=utf8 0 0
    /dev/dvd /mnt/dvd udf ro,user,noauto,unhide,iocharset=utf8 0 0
    /dev/fd0 /mnt/fd0 vfat user,noauto 0 0
    /dev/sdb1 swap swap defaults 0 0
    /dev/sdb2 / ext3 defaults 0 1
    /dev/sdb3 /home ext3 defaults 0 1
    #/dev/sda1 /home/alexey/mnt/a ext3 defaults 0 1
    It's /dev/sda1, now commented. Real trouble began when I tried to reboot. The kernel told me there's no root file system on sdb2; it checked the disks unsuccessfully, with scary messages about bad device names and device blocks, advised me to use rootfstype=kernel option, etc. sda1 turned out "bad" too. In fallback mode the system booted, but with file systems mounted read only; not much use... Using some recovery disk I commented out the /dev/sda1 line in /etc/fstab on suspicion that sda is the real offender; tried to reboot, without much success, then rebooted again, and something clicked into place; the system is back to normal, but I fear to approach sda1 . What happened? Any suggestion/link is going to be appreciated. It was pure luck; next time it could be much worse.
    Edit:
    Looks like 'clicked into place' is just the fallback kernel; kernel-related issue? It ran smoothly after the initial upgrade for a couple of weeks.
    Edit:
    A relevant snippet from kernel.log:
    Apr 23 19:52:25 stovepipebox ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xffa0 irq 14
    Apr 23 19:52:25 stovepipebox ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xffa8 irq 15
    Apr 23 19:52:25 stovepipebox ata2.00: ATAPI: _NEC DVD_RW ND-4550A, 1.06, max UDMA/33
    Apr 23 19:52:25 stovepipebox ata2.00: configured for UDMA/33
    Apr 23 19:52:25 stovepipebox scsi 1:0:0:0: CD-ROM _NEC DVD_RW ND-4550A 1.06 PQ: 0 ANSI: 5
    Apr 23 19:52:25 stovepipebox sata_nv 0000:00:0e.0: version 3.5
    Apr 23 19:52:25 stovepipebox ACPI: PCI Interrupt Link [LSA0] enabled at IRQ 23
    Apr 23 19:52:25 stovepipebox ACPI: PCI Interrupt 0000:00:0e.0[A] -> Link [LSA0] -> GSI 23 (level, low) -> IRQ 16
    Apr 23 19:52:25 stovepipebox PCI: Setting latency timer of device 0000:00:0e.0 to 64
    Apr 23 19:52:25 stovepipebox scsi2 : sata_nv
    Apr 23 19:52:25 stovepipebox scsi3 : sata_nv
    Apr 23 19:52:25 stovepipebox ata3: SATA max UDMA/133 cmd 0xe800 ctl 0xe480 bmdma 0xe000 irq 16
    Apr 23 19:52:25 stovepipebox ata4: SATA max UDMA/133 cmd 0xe400 ctl 0xe080 bmdma 0xe008 irq 16
    Apr 23 19:52:25 stovepipebox ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
    Apr 23 19:52:25 stovepipebox ata3.00: ATA-6: ST3120827AS, 3.42, max UDMA/133
    Apr 23 19:52:25 stovepipebox ata3.00: 234441648 sectors, multi 16: LBA48 NCQ (depth 0/32)
    Apr 23 19:52:25 stovepipebox ata3.00: model number mismatch 'ST3120827AS' != '3120827AS '
    Apr 23 19:52:25 stovepipebox ata3.00: revalidation failed (errno=-19)
    Apr 23 19:52:25 stovepipebox ata3: limiting SATA link speed to 1.5 Gbps
    Apr 23 19:52:25 stovepipebox ata3.00: limiting speed to UDMA/133:PIO3
    Apr 23 19:52:25 stovepipebox ata3: failed to recover some devices, retrying in 5 secs
    Apr 23 19:52:25 stovepipebox ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
    Apr 23 19:52:25 stovepipebox ata3.00: configured for UDMA/133
    Apr 23 19:52:25 stovepipebox ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
    Apr 23 19:52:25 stovepipebox ata4.00: ATA-7: ST3320620AS, 3.AAK, max UDMA/133
    Apr 23 19:52:25 stovepipebox ata4.00: 625142448 sectors, multi 16: LBA48 NCQ (depth 0/32)
    Apr 23 19:52:25 stovepipebox ata4.00: configured for UDMA/133
    Apr 23 19:52:25 stovepipebox scsi 2:0:0:0: Direct-Access ATA ST3120827AS 3.42 PQ: 0 ANSI: 5
    Apr 23 19:52:25 stovepipebox scsi 3:0:0:0: Direct-Access ATA ST3320620AS 3.AA PQ: 0 ANSI: 5
    This "model number mismatch 'ST3120827AS' != '3120827AS " looks like a result of a corrupted config (at least, I suspect so ). Any questions/suggestions?
    Last edited by Llama (2008-05-02 20:20:04)

    I had this same damn thing happen. The problem is in the way the kernel gets its info from the bios. The bios has a nasty habit of switching the drives around even when sda is connected to sata1. This became a problem when libata came about and changed all drives to sdxX naming convention.
    To fix the no booting problem and the stupid rootfstype= error thing, u need to use Persistent block naming device scheme. Here on the wiki is a page dedicated to this... http://wiki.archlinux.org/index.php/Per … ice_naming
    Try it and see if it helps. I used the /dev/by-uuid.

  • [SOLVED]Root file system changed

    I'm currently using ArchLinux
    I'm not sure what went wrong, but now when I login as root and "cd" I don't see the root file system. Instead i see
        [root@aspect ~]# ls -al
    total 36
    drwxr-x---  7 root root 4096 Apr 13 16:29 .
    drwxr-xr-x 17 root root 4096 Apr 13 08:18 ..
    -rw-------  1 root root 2849 Apr 13 16:27 .bash_history
    drwxr-xr-x  2 root root 4096 Apr 13 10:35 .config
    drwx------  3 root root 4096 Apr 13 10:34 .dbus
    -rw-------  1 root root   49 Apr 13 10:35 .directory
    drwxr-xr-x  3 root root 4096 Apr 13 10:34 .kde4
    drwxr-xr-x  3 root root 4096 Apr 13 10:35 .local
    drwx------  3 root root 4096 Apr 13 16:29 .nv
    If I cd to ".." I can see the root file system from there.
    Also When I drag files into terminal, it can't locate them. I Used a java folder I had in downlaods as an example. But it's like this everywhere.
    [aspect@aspect ~]$ file:///home/aspect/Downloads/jre bash: file:///home/aspect/Downloads/jre: No such file or directory
    Last edited by aspectratio (2015-04-13 22:05:33)

    ewaller wrote:
    aspectratio wrote:I've already done all of this. What makes you think I was running KDE as root?
    drwxr-xr-x 3 root root 4096 Apr 13 10:34 .kde4
    Sometime today a hidden directory containing kde files was created in the /root being owned by root.  That's how
    So the problem here is I came from debian. And aparently there when you cd as root, it will bring you to the atual file system.
    Fair enough.
    I was told to edit /etc/passwd and change the root dir to just / from /bin/bash
    Now I can no longer login as root. I will try to boot recue mode and chroot into the system to fix the file.
    That would be the way to fix it.  You may not need to actually chroot, just mount the root partition at /mnt and edit /mnt/etc/passwd.
    As to not running desktop environments as root -- it is a pet peeve of mine.  I am not saying this about you, you understand the issue;  but I have had arguments with people in the past about not running GUI DEs as root, and them insisting on it being their machines and they can do what they want.  They are absolutely correct.  But they can also fend for themselves.
    Edit:  If you do have another user in wheel, and if wheel can gain root privileges, just log in as that user and use sudo to fix it.
    Yeah it's a security risk.
    I've fixed the file. But I'm just not sure why I can't drag and drop paths anymore. It apears as though it's not a common thing anyways.

  • Root file system full

    Hai,
    Thanks to ll for their comments.
    I am getting frequent root file system full message.
    I have been deleting messages,pacct files from /var.
    But it still shows the same msg.
    But when I am restarting the system again it comes to 85%.
    what could be the reason. And why does this happen.where are the files getting created
    or added
    Thank u very much in anticipation.
    sreerama

    Also, if you are running with crash dumps enabled check the /var/crash/<hostname> (will only exist if crash dumps are enabled) directory and see if there are any big files in here (vmcore is a bugger), that's usually a good place to check too.

  • Root File system is reporting that it's full [SOLVED]

    My root file system is reporting as full, and I'd like some ideas on how to track the problem. I've tried a number of things like searching for the largest directory, searching for the largest file, and all that jazz. I'm obviously missing something. /dev/sda3 should be at 50%.
    One note. The computer started what seemed like normal today. I converted my second hard drive to ext4, rebooted, and started to notice that things that needed the /tmp directory couldn't start. I made some quick space to get operational by removing 56M of stuff from pacman's cache, but that's a quick hack. I don't know if this is related or not. I am running testin

    skottish wrote:
    MoonSwan wrote:
    You're a dork who solved this issue and will know better next time.  How is this a bad thing?  I'm sure someone around here has done worse Skottish, so don't feel too stupid.  (Won't name names but I'm sure as well that I've done worse somewhere...)
    In the meantime, while you're down...*bonks skottish with the dork-stick* 
    Thanks for the kind words MoonSwan.
    This happened because of the way my system is set up. I have rsync making backups of /home and /etc to /backup on close. It turns out that rsync created the /backup directory instead of using the existing one. Why? Because /dev/sdb1 wasn't mounted when I restarted after the conversion. Doh!
    no shame in that.  i totally freaked out once when i was still in school because i couldn't find a paper that was due.  turned out i had /home unmounted when i saved the file, but had /home mounted when i went looking for it.
    it was hiding under the mounted filesystem the whole time!

  • SOLVED: kernel loads, but doesn't have a root file system

    Hi,
    The system is an Asus X202E. It does UEFI and has a GPT partition system. I've gotten through that part. And it is clear to me that the kernel loads.
    It's the next step that's giving me grief. I've tried this with two bootloaders: gummiboot and rEFInd.
    With gummiboot, the kernel panics because it can't mount the root file system. With rEFInd, it gets to the intial ramdisk and then drops me to a shell, apparently because the root file system is set to null, and it obviously can't mount that as "real root".
    Here is what I posted on the Arch mailing list, documenting that I have indeed specified the correct root (I'm copying this from the email, eliding the unfortunate line wraps):
    bridge-live# cat /boot/loader/entries/arch.conf
    Title Arch Linux
    linux /vmlinuz-linux
    initrc /initramfs-linux.img
    options root=PARTUUID=d5bb2ad1-9e7d-4c75-b9b6-04865dd77782
    bridge-live# ls -l /dev/disk/by-partuuid
    total 0
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 0ab4d458-cd09-4bfb-a447-5f5fa66332e2 -> ../../sda6
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 3e12caeb-1424-451c-898e-a4ff05eab48d -> ../../sda7
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 432a977b-f26d-4e75-b9ee-bf610ee6f4a4 -> ../../sda3
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 95a1d2c2-393a-4150-bbd2-d8e7179e7f8a -> ../../sda2
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 a4b797d9-0868-4bd1-a92d-f244639039f5 -> ../../sda4
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 d5bb2ad1-9e7d-4c75-b9b6-04865dd77782 -> ../../sda8
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 ed04135b-bd79-4c7c-b3b5-b0f9c2fe6826 -> ../../sda1
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 f64f82a7-8f2b-4748-88b1-7b0c61e71c70 -> ../../sda5
    The root partition is supposed to be /dev/sda8, that is:
    lrwxrwxrwx 1 root root 10 Apr 15 19:26 d5bb2ad1-9e7d-4c75-b9b6-04865dd77782 -> ../../sda8
    So the correct PARTUUID followed by the one I have specified in
    arch.conf is:
    d5bb2ad1-9e7d-4c75-b9b6-04865dd77782
    d5bb2ad1-9e7d-4c75-b9b6-04865dd77782
    I'm guessing that this is really the same problem with both gummiboot and with rEFInd, but don't really know. It's clear to me that the initrd is not being correctly constructed. So I removed /etc/mkinitcpio.conf and did, as per the Arch wiki,
    pacman -Syyu mkinitcpio linux udev
    No joy.
    I don't even know which way to go at this point. If I even knew how to tell it where the real disk is in the initial ram disk shell, that would help. Better of course, would be actually solving the problem.
    Thanks!
    Last edited by n4rky (2013-04-17 21:41:36)

    I have made extremely limited progress on this issue.
    My previous attempt to specify the root partition in mkinitcpio.conf was insufficient. Furthermore, this is no place--despite the documentation--for the orthodoxy about using UUIDs rather than the straight /dev/sdx. In my case:
    root=/dev/sda8
    and run
    mkinitcpio -p linux
    It still drops me into the shell at boot. I can do
    mount /dev/sda8 /new_root/
    and exit the shell. It still won't believe it has the root device and drops me back in. I just exit.
    At this point, for a very brief moment, things look promising. It appears to be starting normally. Then, gdm.service, NetworkManager.service, and dbus.service all fail to start. There may be others but the screen goes by too quickly. At this point, it hangs trying to initialize the pacman keyring and all I can do is CTRL-ALT-DEL.
    It occurred to me that this might extend to the rEFInd configuration and so I modified it to also use /dev/sda8 rather than the UUID, but this made no difference. Trying to boot via gummiboot still yields the previously specified kernel panic.

  • How to add more disk space into /   root file system

    Hi All,
    Linux  2.6.18-128
    can anyone please let us know how to add more disk space into "/" root file system.
    i have added new hard disk with space of 20GB, 
    [root@rac2 shm]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/hda1             965M  767M  149M  84% /
    /dev/hda7             1.9G  234M  1.6G  13% /var
    /dev/hda6             2.9G   69M  2.7G   3% /tmp
    /dev/hda3             7.6G  4.2G  3.0G  59% /usr
    /dev/hda2              18G   12G  4.8G  71% /u01
    LABLE=/               2.0G     0  2.0G   0% /dev/shm
    /dev/hdb2             8.9G  149M  8.3G   2% /vm
    [root@rac2 shm]#

    Dude! wrote:
    I would actually question whether or not more disks increase the risk of a disk failure. One disk can break as likely as one of two of more disks.
    Simple stats.  Buying 2 lottery tickets instead of one, gives you 2 chances to win the lottery prize. Not 1. Even though the odds of winning per ticket remains unchanged.
    2 disks buy you 2 tickets in The-Drive-Failure lottery.
    Back in the 90's, BT (British Telecom) had a 80+ node OPS cluster build with Pyramid MPP hardware. They had a dedicated store of scsi disks for replacing failed disks - as there were disk failure fairly often due to the number of disks. (a Pryamid MPP chassis looked like a Xmas tree with all the scsi drive LEDs, and BT had several)
    In my experience - one should rather expect a drive failure sooner, than later. And have some kind of contingency plan in place to recover from the failure.
    The use of symbolic links instead of striping the filesystem protects from the complete loss of the enchilada if a volume member fails, but it does not reduce the risk of loosing data.
    I would rather buy a single ticket for the drive failure lottery for a root drive, than 2 tickets in this case. And using symbolic links to "offload" non-critical files to the 2nd drive means that its lottery ticket prize is not a non-bootable server due to a toasted root drive.

  • Sol10 u8 installed on a ZFS Root File System have different swap needs?

    Does Sol10 u8 installed on a ZFS Root File System have different swap needs/processes?
    Information:
    I've installed Solaris 10 (10/09 s10s_u8wos_08a SPARC, Assembled 16 September 2009) on a half dozen servers and every one of them no longer mount swap at boot.
    The install program commented out the old swap entry and created this one:
    # grep swap /etc/vfstab
    swap - /tmp tmpfs - yes -
    Everything works like a champ. I didn't discover the issue until I tried to install some patches and the install failed. It didn't fail because of lack of swap - it refused to run because it found "No swap devices configured".
    Here are the symptoms:
    # swap -s
    total: 183216k bytes allocated + 23832k reserved = 207048k used, 13600032k available
    # swap -l
    No swap devices configured
    # mount | grep swap
    /etc/svc/volatile on swap read/write/setuid/devices/xattr/dev=5ac0001 on Mon Apr 19 08:06:45 2010
    /tmp on swap read/write/setuid/devices/xattr/dev=5ac0002 on Mon Apr 19 08:07:40 2010
    /var/run on swap read/write/setuid/devices/xattr/dev=5ac0003 on Mon Apr 19 08:07:40 2010
    #

    Hi Nitabills,
    I assume that you create a zfs entry for swap with the commande zfs create -V $size
    did you launch the command :
    swap -a /dev/zvol/dsdk/$ZPOOL/swap
    Try this entry below in the vfstab :
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  • Problem in Reducing the root file system space

    Hi All ,
    The root file system is reached 86%. We have cleared 1 GB data in /var file system. But the root file system still showing 86%. Please note that the /var file is not seprate file system.
    I have furnished the df -h output for your reference. Please provide solution as soon as possible.
    /dev/dsk/c1t0d0s0 2.9G 2.4G 404M 86% /
    /devices 0K 0K 0K 0% /devices
    ctfs 0K 0K 0K 0% /system/contract
    proc 0K 0K 0K 0% /proc
    mnttab 0K 0K 0K 0% /etc/mnttab
    swap 30G 1.0M 30G 1% /etc/svc/volatile
    objfs 0K 0K 0K 0% /system/object
    /dev/dsk/c1t0d0s3 6.7G 3.7G 3.0G 56% /usr
    /platform/SUNW,Sun-Fire-T200/lib/libc_psr/libc_psr_hwcap1.so.1
    2.9G 2.4G 404M 86% /platform/sun4v/lib/libc_psr.so.1
    /platform/SUNW,Sun-Fire-T200/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1
    2.9G 2.4G 404M 86% /platform/sun4v/lib/sparcv9/libc_psr.so.1
    fd 0K 0K 0K 0% /dev/fd
    swap 33G 3.5G 30G 11% /tmp
    swap 30G 48K 30G 1% /var/run
    /dev/dsk/c1t0d0s4 45G 30G 15G 67% /www
    /dev/dsk/c1t0d0s5 2.9G 1.1G 1.7G 39% /export/home
    Regards,
    R. Rajesh Kannan.

    I don't know if the root partition filling up was sudden, and thus due to the killing of an in-use file, or some other problem. However, I have noticed that VAST amounts of space is used up just through the normal patching process.
    After I installed Sol 10 11/06, my 12GB root partition was 48% full. Now, about 2 months later, after applying available patches, it is 53% full. That is about 600 MB being taken up by the superseded versions of the installed patches. This is ridiculous. I have patched using Sun Update Manager, which by default does not use the patchadd -d option that would not back up old patch versions, so the superseded patches are building up in /var, wasting massive amounts of space.
    Are Solaris users just supposed to put up with this, or is there some other way we should manage patches? It is time consuming and dangerous to manually clean up the old patch versions by using patchrm to delete all versions of a patch and then using patchadd to re-install only the latest revision.
    Thank you.

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