Update failed error cannot open .git/FETCH_HEAD: Read only file system

funkotron77

@Clyde thanks a bunch for your help. Will be posting these logs here shortly. Appreciate you.

Clyde

Just to avoid confusion: The two latter commands will show only the lines that contain the word "mount" from the logs. That's what grep does.

funkotron77

@Clyde

Hey pal. This is what I got.

pi@retropie:~ $ mount | grep " / "
/dev/mmcblk0p2 on / type ext4 (ro,relatime)
pi@retropie:~ $ dmesg | grep mount
[    0.924047] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    0.930110] devtmpfs: mounted
````pi@retropie:~ $ grep mount /var/log/syslog
Sep  3 07:15:30 retropie systemd[1]: Unmounting RPC Pipe File System...
Sep  3 07:15:38 retropie systemd[1]: Starting Remount Root and Kernel File Systems...
Sep  3 07:15:38 retropie systemd[1]: Started Remount Root and Kernel File Systems.
Sep  3 07:15:38 retropie kernel: [    1.002111] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
Sep  3 07:15:38 retropie kernel: [    1.002936] devtmpfs: mounted
Sep  3 07:15:38 retropie kernel: [    3.378821] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
Sep  3 07:15:38 retropie systemd[1]: Starting dphys-swapfile - set up, mount/unmount, and delete a swap file...
Sep  3 07:15:38 retropie systemd[1]: Started dphys-swapfile - set up, mount/unmount, and delete a swap file.
Sep  3 07:50:57 retropie systemd[1]: Unmounting RPC Pipe File System...

Clyde

I see nothing unusual there. Can you re-mount the root FS read/write?

sudo mount -v -o remount,rw /dev/mmcblk0p2

funkotron77

@Clyde

Hi there, tried that and still getting the same issues.

Clyde

@funkotron77 Does the mount command give any output? The -v option means "verbose" and should give you some.

edit: Did you check the rw mode with mount | grep " / " after it? Does touch work then?

mitu

Check the dmesg output after trying re-mounting with the rw flag, the card may be reverting to read-only automatically if damaged.

funkotron77

@Clyde

this is what I got after I did that thing you asked me to do

mount: /dev/mmcblk0p2 mounted on /.

funkotron77

@mitu said in Update failed error cannot open .git/FETCH_HEAD: Read only file system:

Check the dmesg output after trying re-mounting with the rw flag, the card may be reverting to read-only automatically if damaged.

this is what i got

[    0.907347] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    0.908441] devtmpfs: mounted
[  946.183645] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[  968.445007] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)

Clyde

In case dmesg shows something without the word "mount" in it, this will print out the last 20 lines of the unfiltered dmesg output:

dmesg | tail -n 20

Can you show us its output directly after the remount command?

Alas, I don't know if or what message we'd have to expect when a damaged sd card remounts the file system as read-only by itself.

funkotron77

@Clyde
Hey pal, will do. Got a brunch to go to then will report back. If you guys think I should just take the L and restart everything from scratch I’ll do it. Just being lazy about transferring Roms and doing my settings and stuff. ;)

Cheers to you guys for your help. Appreciate it :)

Clyde

@funkotron77 Well, since you said that you have a full backup, you could try to install RetroPie from scratch and then do only the bare minimum of setup to see if the card is writable then.

But before something drastic like that, let's see the dmesg output. 🧐

funkotron77

@Clyde

For sure. If there is any way to salvage I would definitely like to do that. Thanks pal. :)

dmesg | tail -n 20
[    6.485270] 8021q: adding VLAN 0 to HW filter on device eth0
[    6.698502] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[    6.722465] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Mar  2
2020 23:30:41 version 7.45.202 (r724630 CY) FWID 01-72f6ece2
[    7.155834] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[    7.155894] brcmfmac: power management disabled
[   13.107996] Bluetooth: Core ver 2.22
[   13.108092] NET: Registered protocol family 31
[   13.108099] Bluetooth: HCI device and connection manager initialized
[   13.108124] Bluetooth: HCI socket layer initialized
[   13.108136] Bluetooth: L2CAP socket layer initialized
[   13.108176] Bluetooth: SCO socket layer initialized
[   13.128848] Bluetooth: HCI UART driver ver 2.3
[   13.128863] Bluetooth: HCI UART protocol H4 registered
[   13.128953] Bluetooth: HCI UART protocol Three-wire (H5) registered
[   13.129158] Bluetooth: HCI UART protocol Broadcom registered
[   13.194504] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   13.427863] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   13.427873] Bluetooth: BNEP filters: protocol multicast
[   13.427888] Bluetooth: BNEP socket layer initialized
[   15.398452] ICMPv6: process `dhcpcd' is using deprecated sysctl (syscall) net                                                                              .ipv6.neigh.wlan0.retrans_time - use net.ipv6.neigh.wlan0.retrans_time_ms instea

Clyde

@funkotron77 Again, I see nothing. Maybe also check the /var/log/syslog, but without grep to see every message. A simple cat /var/log/syslog will show it, and you could copy & paste the last part of the output. To be sure, you could look at it before and after the remount command, to check for changes (the same goes for dmesg).

After that, alas, I'm out of ideas. I never had to deal with something similar myself yet.