similar to: Question about RAID 5 array rebuild with mdadm

Displaying 20 results from an estimated 7000 matches similar to: "Question about RAID 5 array rebuild with mdadm"

2010 May 28
2
permanently add md device
Hi All Currently i'm setting up a 5.4 server and try to create a 3rd raid device, when i run: $mdadm --create /dev/md2 -v --raid-devices=15 --chunk=32 --level=raid6 /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm /dev/sdn /dev/sdo /dev/sdp /dev/sdq the device file "md2" is created and the raid is being configured. but somehow
2016 May 25
6
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
I?ve posted this on the forums at https://www.centos.org/forums/viewtopic.php?f=47&t=57926&p=244614#p244614 - posting to the list in the hopes of getting more eyeballs on it. We have a cluster of 23 HP DL380p Gen8 hosts running Kafka. Basic specs: 2x E5-2650 128 GB RAM 12 x 4 TB 7200 RPM SATA drives connected to an HP H220 HBA Dual port 10 GB NIC The drives are configured as one large
2016 May 27
2
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
All of our Kafka clusters are fairly write-heavy. The cluster in question is our second-heaviest ? we haven?t yet upgraded the heaviest, due to the issues we?ve been experiencing in this one. Here is an iostat example from a host within the same cluster, but without the RAID check running: [root at r2k1 ~] # iostat -xdmc 1 10 Linux 3.10.0-327.13.1.el7.x86_64 (r2k1) 05/27/16 _x86_64_ (32 CPU)
2019 Jun 14
3
zfs
Hi, folks, testing zfs. I'd created a zpoolz2, ran a large backup onto it. Then I pulled one drive (11-drive, one hot spare pool), and it resilvered with the hot spare. zpool status -x shows me state: DEGRADED status: One or more devices could not be used because the label is missing or invalid. Sufficient replicas exist for the pool to continue functioning in a degraded state.
2012 Sep 05
3
BTRFS thinks device is busy [kernel 3.5.3]
Hi, I''m running OpenSuse 12.2 with kernel 3.5.3 HBA= LSI 1068e using the MPTSAS driver (patched) (https://patchwork.kernel.org/patch/1379181/) SANOS1:/media # uname -a Linux SANOS1 3.5.3 #3 SMP Sun Sep 2 18:44:37 CEST 2012 x86_64 x86_64 x86_64 GNU/Linux I''ve tried to simulate a disk replacement but it seems that now /dev/sdg is stuck in the btrfs pool (RAID10) SANOS1:/media #
2016 May 25
1
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
On 2016-05-25 19:13, Kelly Lesperance wrote: > Hdparm didn?t get far: > > [root at r1k1 ~] # hdparm -tT /dev/sda > > /dev/sda: > Timing cached reads: Alarm clock > [root at r1k1 ~] # Hi Kelly, Try running 'iostat -xdmc 1'. Look for a single drive that has substantially greater await than ~10msec. If all the drives except one are taking 6-8msec, but one is very
2009 Jan 13
2
mounted.ocfs2 -f return Unknown: Bad magic number in inode
Hello, I have installed ocfs2 without problem and use it for a RAC10gR2. Only Clusterware files are ocfs2 type. multipath is also used. When I issue : mounted.ocfs2 -f I have a strange result: Device FS Nodes /dev/sda ocfs2 Unknown: Bad magic number in inode /dev/sda1 ocfs2 pocrhel2, pocrhel1 /dev/sdb ocfs2 Not mounted /dev/sdf
2010 Sep 17
1
multipath troubleshoot
Hi, My storage admin just assigned a Lun (fibre) to my server. Then re scanned using echo "1" > /sys/class/fc_host/host5/issue_lip echo "1" > /sys/class/fc_host/host6/issue_lip I can see the scsi device using dmesg But mpath device are not created for this LUN Pleas see below. The last 4 should be active and I think this is the problem Kernel:
2011 Nov 22
1
Recovering data from old corrupted file system
I have a corrupted multi-device file system that got corrupted ages ago (as I recall, one of the drives stopped responding, causing btrfs to panic). I am hoping to recover some of the data. For what it''s worth, here is the dmesg output from trying to mount the file system on a 3.0 kernel: device label Media devid 6 transid 816153 /dev/sdq device label Media devid 7 transid 816153
2016 Jun 01
0
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
I did some additional testing - I stopped Kafka on the host, and kicked off a disk check, and it ran at the expected speed overnight. I started kafka this morning, and the raid check's speed immediately dropped down to ~2000K/Sec. I then enabled the write-back cache on the drives (hdparm -W1 /dev/sd*). The raid check is now running between 100000K/Sec and 200000K/Sec, and has been for several
2005 Oct 11
0
AW: Re: xen 3.0 boot problem
> > Well, i''m using here the qla2340 on several boxes. It works > > with Xen 2.0 but noch with Xen 3.0. as part of SUSE Linux 10.0: > > Interesting. If the driver really doews work flawlessly in > Xen 2, then I think the culprit has to be interrupt routeing. > > Under Xen 3, does /proc/interrupts show you''re receiving interrupts? I cannot boot with
2005 Oct 11
0
AW: Re: xen 3.0 boot problem
> > Well, i''m using here the qla2340 on several boxes. It works > > with Xen 2.0 but noch with Xen 3.0. as part of SUSE Linux 10.0: > > Interesting. If the driver really doews work flawlessly in > Xen 2, then I think the culprit has to be interrupt routeing. > > Under Xen 3, does /proc/interrupts show you''re receiving interrupts? I cannot boot with
2005 Nov 24
1
boot with more scsi card
hi, we've got a server with a 8 port 3ware card and 2 ide system disks. now we'd like to replace the ide disks with scsi disks or sata disks (these also recognized as scsi in the kernel). but we can't boot from it. the problem are twofold. first in the normal case the first scsi host scsi0 id the 3ware card, but grub only see the first 8 disk so if the system disk are sdi and sdj the
2020 Sep 09
4
Btrfs RAID-10 performance
Hi, thank you for your reply. I'll continue inline... Dne 09.09.2020 v 3:15 John Stoffel napsal(a): > Miloslav> Hello, > Miloslav> I sent this into the Linux Kernel Btrfs mailing list and I got reply: > Miloslav> "RAID-1 would be preferable" > Miloslav> (https://lore.kernel.org/linux-btrfs/7b364356-7041-7d18-bd77-f60e0e2e2112 at lechevalier.se/T/). >
2020 Sep 07
4
Btrfs RAID-10 performance
Hello, I sent this into the Linux Kernel Btrfs mailing list and I got reply: "RAID-1 would be preferable" (https://lore.kernel.org/linux-btrfs/7b364356-7041-7d18-bd77-f60e0e2e2112 at lechevalier.se/T/). May I ask you for the comments as from people around the Dovecot? We are using btrfs RAID-10 (/data, 4.7TB) on a physical Supermicro server with Intel(R) Xeon(R) CPU E5-2620 v4 @
2014 Jun 20
1
iostat results for multi path disks
Here is a sample of running iostat on a server that has a LUN from a SAN with multiple paths. I am specifying a device list that just grabs the bits related to the multi path device: $ iostat -dxkt 1 2 sdf sdg sdh sdi dm-7 dm-8 dm-9 Linux 2.6.18-371.8.1.el5 (db21b.den.sans.org) 06/20/2014 Time: 02:30:23 PM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await
2010 Jun 03
2
Tracking down hangs
We're using a storage solution involving two SunFire X4500 servers using DRBD to replicate a 15TB partition across the network with ocfs2 on top. We're sharing the partition from one server over NFS and the other is mounted read-only at present. The DBRD backing store is software RAID 60 on 40 disks. We've been seeing periodic issues whereby our NFS clients (Debian Lenny) are very
2015 Feb 28
3
disk space trouble on ec2 instance
Hey all, Ok, so I've been having some trouble for a while with an EC2 instance running CentOS 5.11 with a disk volume reporting 100% usage. Root is on an EBS volume. So I've tried the whole 'du -sk | sort -nr | head -10' routine all around this volume getting rid of files. At first I was getting rid of about 50MB of files. Yet the volume remains at 100% capacity. Thinking
2020 Sep 09
0
Btrfs RAID-10 performance
>>>>> "Miloslav" == Miloslav H?la <miloslav.hula at gmail.com> writes: Miloslav> Hello, Miloslav> I sent this into the Linux Kernel Btrfs mailing list and I got reply: Miloslav> "RAID-1 would be preferable" Miloslav> (https://lore.kernel.org/linux-btrfs/7b364356-7041-7d18-bd77-f60e0e2e2112 at lechevalier.se/T/). Miloslav> May I ask you
2013 Nov 07
1
IBM Storwize V3700 storage - device names
Hello, I have IBM Storwize V3700 storage, connected to 2 IBM x3550 M4 servers via fiber channel. The servers are with QLogic ISP2532-based 8Gb Fibre Channel to PCI Express HBA cards and run Centos 5.10 When I export a volume to the servers, each of them sees the volume twice, i.e /dev/sdb and /dev/sdc, with the same size. Previously I have installed many systems with IBM DS3500 series of