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SLX failed to upgrade due to "Read-only file system error"

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TitleSLX failed to upgrade due to "Read-only file system error"
Symptoms
  • SLX failed to upgrade due to "Read-only file system error"
    SLX9540# firmware download scp host 192.168.1.1 directory /ptt/tftpboot/slx/slxos18r.1.00aa user scponly use-vrf mgmt-vrf 
    Password: ******** 
    Performing system sanity check... 
    
    
    
    This command will cause a cold/disruptive reboot and will require that existing telnet, secure telnet or SSH sessions be restarted. 
    
    Do you want to continue? [y/n]:y 
    2019/01/08-04:05:47.378563 , [SULB-1000], 109620,, WARNING, SLX9540, The firmware download command has been started. 
    Checking conditions for downloading to 18.1.0 
    System settings check passed (0). 
    
    
    You are running firmwaredownload with auto-reboot and auto-commit enabled. After the firmware is downloaded the system will reboot and commit firmware automatically. 
    You are also running 'firmware download' for KVM HOST OS. 
    2019/01/08-04:06:50.699076 , [HASM-1120], 109621,, INFO, SLX9540, Current version 17r.2.01. 
    2019/01/08-04:06:50.729690 , [SULB-1105], 109622,, WARNING, SLX9540, Firmware upgrade session (0: single MM upgrade) starts. 
    2019/01/08-04:06:50.836010 , [SULB-1100], 109623,, INFO, SLX9540, Firmware install begins on SW/0. 
    Preparing for firmware download... 
    swbd number 4000 
    SLX-OS Firmwaredownload Start 
    Installing 45 packages. Please wait... 
    Installing Package busybox_1.21.0-1ubuntu1_amd64.deb. 
    Selecting previously unselected package busybox. 
    (Reading database ... 17580 files and directories currently installed.) 
    Preparing to unpack .../busybox_1.21.0-1ubuntu1_amd64.deb ... 
    Unpacking busybox (1:1.21.0-1ubuntu1) ... 
    Setting up busybox (1:1.21.0-1ubuntu1) ... 
    ############################### [ 100% ] 
    #####################################################################################
    ##################################OUTPUT OMITTED#####################################
    #####################################################################################
    unable to securely remove '/mnt/core_files/panic/vmlinux.dpkg-new': Read-only file system 
    dpkg-deb (subprocess): decompressing archive member: internal gzip write error: Broken pipe 
    dpkg-deb (subprocess): cannot copy archive member from '/tmp/fwdl-20450/kernel-swbd4000-2.6.34.6-1.amd64.deb' to decompressor pipe: failed to write (Broken pipe) 
    dpkg-deb: error: subprocess <decompress> returned error exit status 2 
    chown: cannot access '/core_files/panic/vmlinux': No such file or directory 
    Errors were encountered while processing: 
    /tmp/fwdl-20450/kernel-swbd4000-2.6.34.6-1.amd64.deb 
    Failed to install Package kernel-swbd4000-2.6.34.6-1.amd64.deb. Retrying ... 
    :Done install Package 
    Installation failed 43 
    Firmware download failed. 
    SLX-OS Firmwaredownload End 
    2019/01/08-04:08:17.927388 , [SULB-1102], 109624,, WARNING, SLX9540, Firmware install failed on SW/0 with error (43). 
    2019/01/08-04:08:17.980732 , [SULB-1100], 109625,, INFO, SLX9540, Firmware recover begins on SW/0. 
    2019/01/08-04:08:47.814568 , [SULB-1101], 109626,, INFO, SLX9540, Firmware recover ends on SW/0. 
    2019/01/08-04:08:47.869471 , [SULB-1104], 109627,, CRITICAL, SLX9540, Firmware download failed but recovered on SW/0 with error (43). 
    2019/01/08-04:08:47.875698 , [SULB-1107], 109628,, WARNING, SLX9540, Firmware upgrade session (0: single MM upgrade) failed but recovered. 
    The command has failed. Please run "show firmwaredownloadstatus" to view the status.
  • "show firmwaredownloadstatus" displays error code 43 for firmware download failure
    SLX9540# show firmwaredownloadstatus 
    
    [1]: Tue Jan 8 04:06:50 2019 
    Slot SW/0: Firmware install begins. 
    
    [2]: Tue Jan 8 04:08:17 2019 
    Slot SW/0: Firmware install ends. Failed to install package.(43) 
    
    [3]: Tue Jan 8 04:08:17 2019 
    Slot SW/0: Firmware recovery begins. 
    
    [4]: Tue Jan 8 04:08:47 2019 
    Slot SW/0: Firmware recovery ends. 
    
    [5]: Tue Jan 8 04:08:47 2019 
    Slot SW/0: Firmware download failed but it has recovered successfully.
Environment
  • SLXOS
  • SLX Series
  • Firmware upgrade
Cause
Read-only filesystem errors are triggerred by heavy writes to the Solid State Drive(SSD).  A fix is in place to reduce the disk write operation to the SSD and improve the SSD data integrity thereby reducing the possibility of this error re-occurring.
Resolution
  • Workaround
    • Reload the SLX device and proceed again with the upgrade
  • Fix
    • Upgrade to SLXOS 18r.1.00a or any other firmware that has the fix for DEFECT000659154
Additional notes
Please check the available release notes on the Extreme Portal for up to date information on the firmware release that has the fix for the aforementioned defect.

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