similar to: Problems with RAID0 array on new server

I have a relatively new test environment setup that is a little different from your typical scenario. This is my first time using OCFS2, but I believe it should work the way I have it setup. All of this is setup on VMWare virtual hosts. I have two front-end web servers and one backend administrative server. They all share 2 virtual hard drives within VMware (independent, persistent, &

I noticed that if I have single-device allocation for data in a multi-device btrfs filesystem, a balance operation will convert the data to RAID0. This is true even if ''-d single'' is specified explicitly when creating the filesystem. Then it wants to continue using RAID0 for future data allocations, and I run out of space once there''s no longer two drives with space

Hi There. I have the following setup : Asterisk 1.2.4 , freePBX 2.0.1, spandsp-0.0.2pre24 My problem is as follows : If I set up a very simple extensions.conf. when I dial from a fax machine, it seems as if no fax is being recognised. If I answer the call, I can hear the fax machine beeping. extensions.conf :

Hallo, linux-btrfs, First I create an array of 2 disks with mkfs.btrfs -d raid0 -m raid1 /dev/sdb1 /dev/sdd1 and mount it at /srv/MM. Then I fill it with about 1,6 TByte. And then I add /dev/sde1 via btrfs device add /dev/sde1 /srv/MM btrfs filesystem balance /srv/MM (it run about 20 hours) Then I work on it, copy some new files, delete some old files - all works well. Only df

How can I verify the read speed of a btrfs raid0 pair in archlinux.? I assume raid0 means striped activity in a paralleled mode at lease similar to raid0 in mdadm. How can I measure the btrfs read speed since it is copy-on-write which is not the norm in mdadm raid0.? Perhaps I cannot use the same approach in btrfs to determine the performance. Secondly, I see a methodology for raid10 using

Hey! I have big problem with my centos 5.1. I have two hard discs 500gig and 40gig and those are in RAID0. I would like to remowe the small 40gig hd and put new 500gig hd and i don't wan't raid0 anymore. How can i copy data from 40gig hd to 500gig hd and switch 40gig hd to new 500gig hd? Another question: Can i just copy all my files to windows laptop and if i wan't

I'm trying to work out the kinks of a proprietary, old, and clunky application that runs on CentOS. One of its main problems is that it writes image sequences extremely non-linearly and in several passes, using many CPUs, so the sequences get very fragmented. The obvious solution to this seems to be to use SSDs for its output, and some scripts that will pick up and copy our the sequences

hi guys, gals do you know if conversion from lvm's raid10 to raid0 is possible? I'm fiddling with --splitmirrors but it gets me nowhere. On "takeover" subject man pages says: "..between striped/raid0 and raid10."" but no details, nowhere I could find documentation, nor a howto. many thanks, L.

is it RAID 0 (striped) or raid1 (mirrored) ?? if you wrote on half of a raid0 stripe set, you basically trashed it. blocks are striped across both drives, so like 16k on the first disk, then 16k on the 2nd then 16k back on the first, repeat (replace 16k with whatever your raid stripe size is). if its a raid 1 mirror, then either disk by itself has the complete file system on it, so you should be

Hi, So the case is, now I''ve got a btrfs image file, which is created from a raid0 btrfs fs. And if I run ''btrfs-image -r image_file /dev/sdf'', then I have to mount it with ''degraded'' mode, and that still fails because raid0 requires two disks at least. So any ideas how to make it work? thanks, liubo -- To unsubscribe from this list: send the line

I just noticed something very strange on one of our Dell PE1750 servers. It is running FreeBSD 4-STABLE on dual CPU's with the embedded Dell Raid controller (amr driver). Attached are 3 disks of 145GB. On a RAID5 logical drive this gives me ~280GB storage. Up until the last reboot (35 days ago) the 'amrcontrol' status utility gave me: Logical drive 0 Stipes blah Size blah

I have two disks that I formatted as btrfs RAID0 on opensuse 11.3. The raid worked well several days until there was a power surge. The system successfully rebooted and the btrfs raid reappeared, but the kernel occasionally threw oops. That was my first experience with oops. After two days, the btrfs raid failed to mount via fstab and when I manually tried to mount it, there was a kernel

On 11/04/2020 10:21 PM, John Pierce wrote: > is it RAID 0 (striped) or raid1 (mirrored) ?? > > if you wrote on half of a raid0 stripe set, you basically trashed it. > blocks are striped across both drives, so like 16k on the first disk, then > 16k on the 2nd then 16k back on the first, repeat (replace 16k with > whatever your raid stripe size is). > > if its a raid 1

> On Nov 4, 2020, at 9:21 PM, John Pierce <jhn.pierce at gmail.com> wrote: > > is it RAID 0 (striped) or raid1 (mirrored) ?? > > if you wrote on half of a raid0 stripe set, you basically trashed it. > blocks are striped across both drives, so like 16k on the first disk, then > 16k on the 2nd then 16k back on the first, repeat (replace 16k with > whatever your raid

Hello, I am on Ubuntu Server 13.04 with Linux 3.8. I''ve created a "single-raid" using /dev/sd{a,b,c,d}{1,3}. One of my hard drives has failed, I mean it''s materially dead. :~$ sudo btrfs filesystem show Label: none uuid: 40886f51-8c9b-4be1-8721-83bf5653d2a0 Total devices 5 FS bytes used 226.90GB devid 4 size 37.27GB used 31.01GB path /dev/sdd1

Hi all I am having some trouble using the ext2online utility, I have reduced the problem down to its simplist form, and it goes soemthing like this: Start with a regular msdos labelled disk (I have tried lvm volumes): Command (m for help): p Disk /dev/sdb: 18.3 GB, 18351967232 bytes 64 heads, 32 sectors/track, 17501 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Device Boot

My computer running CentOS 7 is configured to use BIOS RAID0 and has two identical SSDs which are also encrypted. I had a crash the other day and due to a bug in the operating system update, I am unable to boot the system in RAID mode since dracut does not recognize the disks in grub. After modifying the grub command line I am able to boot the system from one of the harddisks after entering the

Hi, I do have a disk array that is providing striped LUNs to my Solaris box. Hence I''d like to simply concat those LUNs without adding another layer of striping. Is this possibile with ZFS? As far as I understood, if I use zpool create myPool lun-1 lun-2 ... lun-n I will get a RAID0 striping where each data block is split across all "n" LUNs. If that''s

I have a usb hd that I use for backup. Occasionally it dies. scsi 6:0:0:0: rejecting I/O to dead device scsi 6:0:0:0: rejecting I/O to dead device scsi 6:0:0:0: rejecting I/O to dead device scsi 6:0:0:0: rejecting I/O to dead device Buffer I/O error on device sdc1, logical block 0 lost page write due to I/O error on sdc1 EXT2-fs error (device sdc1): read_inode_bitmap: Cannot read inode bitmap -

Ok guys & gals here is the scenario: 1.) Host RHEL 4 U3 2.6.9-34.0.2.EL 2.) OCFS2 latest version 3.) Successfully formatted & mounted OCFS2 filesystems on 2 nodes /dev/sdb1 /u02/oradata/usdev/voting /dev/sdc1 /u02/oradata/usdev/data01 /dev/sdd1 /u02/oradata/usdev/data02 /dev/sde1 /u02/oradata/usdev/data03 4.) Downloaded & installed ASMLib 2.0 on both nodes 5.) Ran