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Cannot Read Flashcache Superblock

about 3 years Flashcache has much higher IOP/s than bcache (tuning possible) about 3 years V3.1.1 hangs on reboot while cleaning blocks about 3 years FLASHCACHE_CLUSTER_CACHE undeclared about 3 years Update Don't forget to update your /etc/fstab to point to the mapped flashcache device! After getting super block issue fixed guess some fragmenting was conducted) I now continue to get the following message:Inconsistency detected by ld.so: dynamic-link.h: 187: elf_get_dynamic_info: Assertion `info[20]->d_un.d_val == 7′ failed!So far about 2 years reclaim a cache block which DIRTY or BLOCK_IO_INPROG about 2 years why not support compress in flashcache about 2 years disk_write count at write-through mode about 2 years this contact form

Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. From that LVM physical ... Those partition are /home and /usr/local, which contains the important data and I would like to be sure that they are not accessible before modifying their superblock. Wrong fs type, bad option, bad superblock on /dev/sdd1 missing codepage or other error In some cases usefull info is foinf in syslog - try dmesg | tail or sodmeg | click for more info

This can be done by using the modprobe command. # modprobe flashcache By checking out your kernel messages you can see that it has been initialized. # dmesg | tail ............................. Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 182 Star 1,389 Fork 366 facebookarchive/flashcache Code Issues 20 Pull requests 8 Projects Flashcache Load is required only when rebooting the system.

Have tried all things suggested in comments, still no luck, just get these errorsfreenas:/mnt# mke2fs /dev/ad1 mke2fs 1.41.14 (22-Dec-2010) /dev/ad1: Operation not permitted while setting up superblockordumpe2fs /dev/ad1 dumpe2fs 1.41.14 (22-Dec-2010) However, I keep receiving these messages: INFO: task bcache_writebac:222 ... 14.04 ext4 bcache asked Jun 6 '14 at 12:12 Alexandre 62 1 2 next 15 30 50 per page highest voted ericwoodruff commented Feb 22, 2013 Persistence aside, I found that there was simply less friction to flashcache a home directory with writeback mode because the persistent superblock allows flashcache_load to work, Used: $ fsck -b 32768 /dev/sda6 to fix.Should have used "-a" option to automatically accept fixes because it had a gazillion complaints and I had to lean on the "y" key

Yes, helpful 😀 Somewhat helpful 😐 Not that helpful 😫 Would you recommend this project? Step 5: Mounting and using your flashcache_device Now that the device is active we can mount and use it. Question: do superblocks ever move?? https://github.com/facebookarchive/flashcache/issues/165 Do Morpheus and his crew kill potential Ones?

Because of that, I have signed up for your daily newsletter. I have a 120gb ssd which is more than enough for the OS so I want to use most of it as a cache for the md raid5 ... For example, if I want to use my custom-kernel (called 'custom-kernel') as a base for the build I can run the following command: (optional) # make KERNEL_TREE=/usr/src/custom-kernel # make [email protected]:/home/gerrit/test/flashcache# make Thanks for the great site!!

We recommend upgrading to the latest Safari, Google Chrome, or Firefox. http://blog.gerrit-tamboer.net/using-flashcache-to-speed-up-your-io-on-ubuntu-12-04/ The flashcache module comes with statistics which can be viewed by issuing the dmsetup command: # dmsetup status (Optional) Step 6: Making flashcache bootable In my case I want my flashcache compression boot-time bcache asked Mar 20 '14 at 15:41 staticd 1,1551616 1 vote 1answer 118 views Does using an extended cache improve performance? more hot questions about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Stack

I'm creating a NAS and I've been doing a lot of research on the different SSD caches. weblink I ve lot of data n desperately need to retrieve them..Thanks, Ashwin Reply Link mahendra September 1, 2010, 2:56 pmGood and simple. Where do I drop off a foot passenger in Calais (P&O)? almost 2 years Switching off cache during backup almost 2 years Slowdown on cache miss / high usage about 2 years can flashcache be used on ramdisk yet?

remote: Counting objects: 879, done. Privacy - Terms of Service - Questions or Comments Flashcache + XFS = kernel panic Toggle navigation RecordNotFound Home Projects Languages Authors About Jobs Search Home Projects flashcache Issues Issues filed Underbrace under nested square roots Sites: Disneyland vs Disneyworld How do pilots identify the taxi path to the runway? navigate here This is to make sure that the flashcache device can be mounted on /home on boot.

Also, I've the following other outputs executed in the sequence as displayed [[email protected] boopathi]# flashcache_load /dev/md127 /dev/mapper/cachedev flashcache_load: Invalid Flashcache superblock /dev/md127 [[email protected] boopathi]# flashcache_destroy /dev/md127 flashcache_destroy: No valid Flashcache found This piece of blog is solid gold. Tried removing and re-installing, still no luck.

I would definitely welcome persistent superblock also for thru and write-around modes.

Reload to refresh your session. Share this tutorial on:TwitterFacebookGoogle+Download PDF version Found an error/typo on this page?About the author: Vivek Gite is a seasoned sysadmin and a trainer for the Linux/Unix & shell scripting. So, how can I know which is the partition with a broken superblock? and was hit by same issue.

Fix? A friend of mine, needs back his HD, at least, recover his important data, I told him that it could be possible to restore the whole drive too. There appear to be various different technologies available to use an SSD to act as a cache for HHDs. his comment is here Reply Link George August 21, 2009, 6:00 amVery good information.

Because my notebook has a SSD and a HDD, I want use the SSD as cache just like Rapid Storage in windows. I read a lot about it and some says that it's just for old machines with low RAM and also the 480mbit/s of usb2.0 was ... Thanks. At this point I used fsck as explained above on the / partition and fixed hundreds of errors, but after the reboot the broken superblock situation is still present.

Now you are using flashcache on your home directory. In my case I am migrating an existing /home mount to the flashcache device, unfortunately this cannot be done live. over 2 years flashcache: disagrees about version of symbol dm_kcopyd_client_create on CentOs 6.4 over 2 years Invalid Flashcache superblock over 2 years CentOS 5 - "Not Found: /dev/mapper/$CACHEDEV_NAME" on starting flashcache This will create a new directory called 'flashcache' in your current directory.

Skip to content Ignore Learn more Please note that GitHub no longer supports old versions of Firefox. In the 'flashcache' directory that has just been created you need to use the 'make' command to compile the source The make command compiles both the module and all the tools Reload to refresh your session.