Questions tagged [bcache]
Bcache is a Linux block layer cache that uses SSDs to cache other block devices.
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How to recover data from drives in bcache configuration
I'm trying to recover the data in hard drives that was set up in raid and bcache.
I'm using ubuntu 22.04 and just migrate the two hard drives in raid 1 to another computer.
I have no longer the ssd ...
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Can I have a swapfile on bcachefs?
Newer Ubuntu versions are using a swap file instead of a swap partition by default.
Can I use a swap file on Ubuntu installed on bcachefs and what are possible problems?
In 2018-12-04, swape was still ...
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How can I install Ubuntu 22.04 on a system with an SSD and a hard drive using full disk encryption?
I would like to install Ubuntu 22.04 on a PC with an NVMe solid-state drive for the OS and a traditional hard drive for /home, using full disk encryption.
Before I buy the hardware, I have been trying ...
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Repair grub boot settings to work with bcache on a Terra PC by Wortmann AG
I wanted to try bcache, since I have a large HDD and a smaller SSD. I followed these instructions pretty closely:
https://kloppenborg.net/blog/installing-ubuntu-20-04-with-bcache/
Hardware is a Terra ...
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I lost my data on bcache after setting the mode to writethrough
This is my first attempt to ask a question on StackExchange so please expect a not so well organized question.
I had 1 512G SSD and 1 4T HDD set up with bcache on Ubuntu 20.4 to be used for nextcloud ...
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How to fix a bcache partition where the pyhsical size is less than the superblock size
I'm in the process of migrating data to a bcache partition. I've created the backing disk and cache disk, and I used dd to copy data from another partition (of the same size) to the new /dev/bcache0 ...
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Advice using SSD/HDD [closed]
I have 120 GB SSD and 2TB HDD. Now I just wondering how to get best performance.
1st option is to install system on SSD and home to HDD. I have that in my laptop and works nice. But it take only 10% ...
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Ubuntu Server 20.04 install custom partitioning
Back when using OpenSUSE for my server, I devised a partitioning scheme that I was very satisfied with - a BTRFS RAID10 on bcache devices. I wanted to recreate this with Ubuntu Server 20.04, but so ...
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Can I change my Bcache settings on the fly?
I made a fresh install of ubuntu 20.04 on my desktop, and then, from within the installation, created a bcache device to put my /home
sudo make-bcache -C /dev/sdb4 -B /dev/sda1
Where /dev/sdb is the ...
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Bcache seems to need update-initramfs
I'm setting up bcache on ubuntu 20.04.
Booting from install CD, I created a bcache dirve by:
#modprobe bcache
#make-bcache -B /dev/mapper-vgubuntu-root
#make-bcache -C /dev/sdb
Just after that #...
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Fstrim ruins bcache's performance
Since Ubuntu 18.04 two machines I use, one desktop and one notebook, both started to present an occasional really slow boot and a really slow performance for everything after that boot. Both use a ...
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Ubuntu Server 18.04 SSD cache on software RAID
I have an installation consisting of 2 HDDs and 1 SSD. I want to run the 2 HDD's in a software RAID 1 with the SSD caching the array. Has somebody done this on Ubuntu Server 18.04 and if so, what were ...
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Server installation fail because "bcache module not found"
When I try to install Ubuntu server 19.04-live-server-amd64 or 18.04.2-live-server-amd64, it fails because an error "bcache module not found". The bug is this, but it is closed as fixed and released.
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bcache for Intel Optane on ubuntu
I would like to use the Intel Optane memory (16GB) with ubuntu 18.10. My Laptop has an HDD for the OS and i thought i can use bcache for this purpose to speed up the experience. Can someone help me ...
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BCache + MDADM running extremely slow
I have 3x 14TB toshiba drives mdadm-ed (/dev/md0) raid 5'd together that are setup as a bcache. I have a 256GB fast SSD as the front of the bache.
write-back is enabled on bcache.
After a few days, ...
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how to release device locked by bcache
Today I bought a 128MB SSD disk, installed it, then installed bcache-tools. After attempting to access the device I got these errors:
root@dev:/sys/block/sda/bcache# make-bcache -B /dev/sdb1 /dev/...
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bcache performance degradation on newer version of Ubuntu kernel
I have an elasticsearch cluster which uses Azure storage with a local SSD bcache. One of the machines has poorer performance because it has cache misses while the other two machines never have cache ...
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Can I use bcache without losing any data first?
My Ubuntu 17.04 (64 bit) box has:
1 x SSD (used for the OS)
2 x HDD (used for data, such as /home and backups etc.)
8GB RAM
If I shrink my SSD and create an empty partition for caching my HDD(s), is ...
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Got a new SSD, don't want to wear it out but I still want to use some of it to store data files together with the old HDD
I bought a new 250GB Samsung 850 EVO SSD for my laptop that I want to use as primary storage device, together with the old but still functioning 250GB 7500 RPM HDD that I put in the former DVD bay ...
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How to install Ubuntu with both disk encryption AND SSD caching
I'm using Ubuntu in a corporate environment, and our security policy states that we have to use full disk encryption.
I've also got a laptop with a 32GB mSATA SSD and 750GB of spinning rust. My ...
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Does bcache support use of an LVM logical volume as a cache device?
I've got a 64GB SSD and a 3TB hard drive in my system running Ubuntu 14.04. The SSD has a small root partition with rest of the device allocated to an LVM physical volume. From that LVM physical ...
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What happens in bcache if the cache ssd dies?
I'm creating a NAS and I've been doing a lot of research on the different SSD caches. 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 ...
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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 4....
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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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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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"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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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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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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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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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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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?
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Does bcache require a fresh installation?
Because my notebook has a SSD and a HDD, I want use the SSD as cache just like Rapid Storage in windows. I find bcache offers this functionality so I decide to try it.
I got bcache and bcache-tools ...
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