similar to: Question about specific patch (eMMC)

Hi all, I have two multi-disk btrfs filesystems on a Arch linux 3.4.0 system. After a power failure, both filesystems refuse to mount [ 10.402284] Btrfs loaded [ 10.402714] device fsid 1e7c18a4-02d6-44b1-8eaf-c01378009cd3 devid 4 transid 65282 /dev/sdc [ 10.403108] btrfs: force zlib compression [ 10.403130] btrfs: enabling inode map caching [ 10.403152] btrfs: disk space caching is

If we''ve abandoned the idea of putting the number of redundant blocks into the top bits of the type bitmask (and I hope we have), then we''re fairly much there. Current code is at: git://, http://git.infradead.org/users/dwmw2/btrfs-raid56.git git://, http://git.infradead.org/users/dwmw2/btrfs-progs-raid56.git We have recovery working, as well as both full-stripe writes

Currently, some new storage devices have the ability to do performance optimizations according to the type of data payload - say, file system metadata, time-stamps, sequential write in some granularity, random write and so on. For example, the latest eMMC 4.5 device can support the so-called ''Context Management'' and ''Data Tag Mechanism'' features. By receiving

Hello, I am trying to figure out where to change mmc rate to maximum speed. All images are loaded from emmc. I see in syslinux.c that it calls loadfile(), but I don't see how the filesystem fread() is actually done from emmc, and where to change its speed to maximum. Thank you for any comment, ranran

Hi, me: > > [mkdiskimage] -s does not prevent zeroizing on block device. Probably > > because truncate() fails. hpa: > Yes, we should probably fix that. The tool was originally designed for > images, not for hardware devices, and it doesn't make much sense to zero > the whole hardware device like that. Maybe for privacy reasons ? But indeed: -s should skip zeroizing,

For using SSDs: Are there any format/mount parameters that should be set for using btrfs on SSDs (other than the "ssd" mount option)? General questions: How long is the ''delay'' for the delayed alloc? Are file allocations aligned to 4kiB boundaries, or larger? What byte value is used to pad unused space? (Aside: For some, the erased state reads all 0x00, and for

Hello, btrfs is failing to mount if I use the mount option acl. I am running debian testing with a debian experimental version of kernel 3.7.3: uname -a Linux nimby 3.7-trunk-486 #1 Debian 3.7.3-1~experimental.1 i686 GNU/Linux from fstab LABEL=btrfs-exthd /mnt/exthd btrfs defaults,noatime,compress=zlib,acl 0 2 from dmesg [ 14.785716] device label btrfs-exthd devid 1 transid

Hello, I''ve got a quick question: Does btrfs adapt to size changes of the underlying block device(s)? My specific situation is as follows: I''ve got a luks-volume on which I want to put btrfs. If this luks-volume grows in the future (i.e. by ''cryptsetup resize''), will btrfs automatically (and reliably) "see" this and be able to use the additional

Greetings, I have a few questions pertaining to BTRFS RAID. I know it''s been rumored a lot recently that kernel 3.4 will have RAID5/6 support, is this still the case. Also, is it possible to change from a single drive system to a raid system or even a multi drive system without raid to a raid system while there is data on the drives an successfully convert them without loosing data?

On Fri, Nov 03, 2017 at 06:48:11AM -0700, Johnny Hughes wrote: > On 11/02/2017 03:38 PM, Fred Smith wrote: > > On Thu, Nov 02, 2017 at 02:09:04PM -0400, m.roth at 5-cent.us wrote: > >> Yves Bellefeuille wrote: > >>> Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: > >>> > >>>> Not intending to contradict (if that ends up as pain,

On 14 November 2013 02:13, Sean Silva <chisophugis at gmail.com> wrote: > I love Arch, but it is probably a bit too unstable for a long-term > buildbot. CC'ing Renato who might have some suggestions. > Mikael, Sean, I think having an Arch buildbot is a great idea. At Linaro, we normally test on Debian-derived distros, and having something else entirely is a good stress test

> We'd like to help in software, but we can't; we have no reliable way > of knowing most of the necessary details of this class of hardware. > It's not exported in any way. > > So unfortunately we are as in the dark as you are in this case. This is incredible, Mr Sandeen. You mean USB flash manufacturers (what's their body - the USB Implementer's Forum?) have

Renato, thanks for your elaborate walk-through of the issues with ARM boards. I'm trying to add some of this to the "How to Build on ARM" document and will submit a patch later on. I already ran into the problem of cores disappearing, but on Arch Linux (which uses a fairly recent kernel), the missing cores come back as soon as the load falls to zero. Unfortunately, my personal

On 8/29/13 10:46 AM, Theodore Ts'o wrote: > So this is fundamentally a problem with the quality of the hardware, > and that's not something the file system can really compensate for. > And there's no way to tell whether a particular USB device has has a > high quality flash device, or is a craptastic flash device. It's not > like we can query the device for "I

On Fri, Aug 30, 2013 at 10:56:17AM +0100, Mark Ballard wrote: > > This is incredible, Mr Sandeen. You mean USB flash manufacturers > (what's their body - the USB Implementer's Forum?) have simply not > provided a means for software to query the underlying hardware in a > USB flash? Have software producers asked them for this? No, they haven't. And yes we have, since

On 14 November 2013 17:43, Mikael Lyngvig <mikael at lyngvig.org> wrote: > Renato, thanks for your elaborate walk-through of the issues with ARM > boards. I'm trying to add some of this to the "How to Build on ARM" > document and will submit a patch later on. > Nice, thanks! That would be great! Unfortunately, my personal budget does not allow me more than a

On 30 April 2014 07:50, Tobias Grosser <tobias at grosser.es> wrote: > In general, I see such changes as a second step. First, we want to have a > system in place that allows us to reliably detect if a benchmark is noisy or > not, second we want to increase the number of benchmarks that are not noisy > and where we can use the results. I personally use the test-suite for

Hi Gene Thanks again for your help. I'm using SYSLINUX 4.05 distributed by Ubuntu. For debugging I'm using SYSLINUX 6.03 because for some reason if I build SYSLINUX 4.05 from sources I get many compilation errors. SYSLINUX is installed on eMMC storage (along with Linux). I don't see the 3-character mode banner display. How can I check it? So I've added some timing prints to

Hi all, below a configuration for udev/initramfs which I propose to scan the block devices looking for a multi-volume btrfs filesystem. Btrfs has the capability to span a file-system on multiple device. In order to do that, the involved devices have to be "registered" in the kernel. In order to do that there are two options: # btrfs device scan <device> (or the old

>From the little I have heard about control systems for cars, which was some years ago, they were blockhead proprietary. The analogy would only work if computing was customarily blackbox technology, which it isn't. I'd be surprised if there were any branded flash drives that contained less than their advertised amount of storage. That leaves the question of what is going on under the