Bcache is a Linux block layer cache that uses SSDs to cache other block devices.

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Recovering disk with corrupted superblock

I am trying to recover a disk that has corrupted superblock but I cant seem to unmount the disk at all. I used bcache for the three extra drive after a reboot one of the drive stopped working. so I ...
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How to setup bcache?

I've tried to set up bcache in Ubuntu 14.04 with a fresh install and an empty /home partition (/dev/sdb2) as a backing device. I have a running system on my SSD and I'd like to use its /dev/sda2 ...
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bcache is not caching all drives

I have 3 HDD and 1 SSD, I have successfully mounted all drives to bcache. pavs@VAS:~$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 132G 35G 90G 28% / none ...
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Using bcache for two used HDD

I have 2 HDD half full, one is 1.5T the other is 2 TB, with NTFS and mounted using ntfs-3g. I have a lot of random reads on those drives. I want to use my 80 GB empty SSD drive as a disk cache for ...
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error in bcache

I used bcache to cache my 24GB SSD using this tutorial. I tried to back up my HDD with: sudo make-bcache -B /dev/sdb1 But I get this error: Can't open dev /dev/sdb1: Device or resource busy My ...
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Bcache hangs on Ubuntu 14.04

I successfully setup my system to use bache in /home partition (200GB SSD partition as cache for 500 GB HDD partition). However, I keep receiving these messages: INFO: task bcache_writebac:222 ...
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bcache corruption after reboot

bcache seems to work fine, but after rebooting, the ext4 filesystem stored in /dev/bcache0 frequently, but not always, becomes corrupted - seemingly, it only damages metadata for recently modified ...
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90 views

If I convert my Ubuntu into Xen hypervizor, will I lose access to the bcache devices?

I'd like to test Xen a little. For obvious reasons I cannot do it under VirtualBox (or can I?) As I understand, Xen works by changing the kernel, thus possibly interfering with the custom kernel ...
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603 views

“Device not found or ignored” when creating physical volume with bcache

I'm attempting to create an LVM volume on a bcache device, but getting "device not found or recognized", despite lsblk clearly showing the device, and bcache state showing "clean". OS is Ubuntu 13.10 ...
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108 views

Any chance of installing Ubuntu on existing bcache device formatted with btrfs?

I setup my system with btrfs as root file system to be able to install additional Linux systems later on (each with separate and small /boot partition) on separate subvolumes. Then I light-heartedly ...
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compressed block device

I wanted to experiment with combining bcache and a compressed block device on a hdd and seeing if this will speedup the boot time. Are there any means of compressing a block device at the block level? ...
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Identify SSD cache drive

I've just bought a crunchy piece of Asus N550LF laptop. The supplier claims that it comes with a secondary 16GB SSD drive, however it's neither listed in BIOS, nor can be seen in gparted as a ...
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610 views

Using btrfs with bcache on /

I am using btrfs with bcache for / on Ubuntu 13.10. It's fast. Unfortunately, during normal boots the step "Scanning for btrfs filesystems" fails. To successfully boot I have to enter recovery mode ...
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331 views

Reccomended options for mounting /dev/bcache0 as /home

I have set up /dev/sda3 on my SSD to cache /dev/sdb3 on my HDD as /dev/bcache0 using bcache in Ubuntu 13.10 (kernel 3.11.0-14-generic). I have formatted it as ext4. I currently mount / (on my SSD) ...
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88 views

Does using an extended cache improve performance?

Does using a extended cache (readyboost-like) improves the overall performance? 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 ...
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6k views

What are the advantages/disadvantages of different SSD to HDD cacheing options (dm-cache, flashcashe…)?

There appear to be various different technologies available to use an SSD to act as a cache for HHDs. The ones I know of: dm-cache (by Redhat - in the 3.9 Kernel, so it should be in ubuntu 13.10) ...
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How do I install and use flashcache/bcache to cache HDD to SSD?

I want to know if there is anyone who has tried installing and running their kernel built with flashcache or bcache for SSD caching? How did you manage to do it?