so I setup a raid ten system and I was wondering what that difference between the active and spare drives is ? if I have 4 active drives then 2 the two stripes are then mirrored right?
root@wolfden:~# cat /proc/mdstat
Personalities : [raid0] [raid10]
md1 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1]
[code]....
Could any RAID gurus kindly assist me on the following RAID-5 issue?I have an mdadm-created RAID5 array consisting of 4 discs. One of the discs was dropping out, so I decided to replace it. Somehow, this went terribly wrong and I succeeded in marking two of the drives as faulty, and the re-adding them as spare.
Now the array is (logically) no longer able to start:
mdadm: Not enough devices to start the array.Degraded and can't create RAID ,auto stop RAID [md1]
I was able to examine the disks though:
Code:
root@127.0.0.1:/etc# mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
code....
Code:
mdadm --create --assume-clean --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2
As I don't want to ruin the maybe small chance I have left to rescue my data, I would like to hear the input of this wise community.
i have cretaed RAID on one of my server RAID health is ok but its shows warning. so what could be the problem. WARNING: 0:0:RAID-1:2 drives:153GB:Optimal Drives:2 (11528 Errors)
View 1 Replies View RelatedI'm breaking into the OS drive side with RAID-1 now. I have my server set up with a pair of 80 GB drives, mirrored (RAID-1) and have been testing the fail-over and rebuild process. Works great physically failing out either drive. Great! My next quest is setting up a backup procedure for the OS drives, and I want to know how others are doing this.
Here's what I was thinking, and I'd love some feedback: Fail one of the disks out of the RAID-1, then image it to a file, saved on an external disk, using the dd command (if memory serves, it would be something like "sudo dd if=/dev/sda of=backupfilename.img") Then, re-add the failed disk back into the array. In the event I needed to roll back to one of those snapshots, I would just use the "dd" command to dump the image back on to an appropriate hard disk, boot to it, and rebuild the RAID-1 from that.
Does that sound like a good practice, or is there a better way? A couple notes: I do not have the luxury of a stack of extra disks, so I cannot just do the standard mirror breaks and keep the disks on-hand, and using something like a tape drive is also not an option.
I just installed Debian 5.0.4 successfully. I want to use the PC as a File Server with two Drives configured as a RAID 1 device. Everything with the RAID device works fine, the only question I have belogs to the GRUB 0.97 Booloader. I would like to be able to boot my Server even if one of the disks fail or the filesystem containing the OS becomes corrupt, so I configured only the data partitions to be a RAID 1 device, so on the second disk should be a copy of the last stable installation, similar to this guide:[URL]...
[Code]...
I am trying to switch over my NAS from Win7 x64 to Debian 8.x Jessie. I have run into a few issues with the power management. When Idle my NAS should be consuming 25W, however it was consuming much more. The more hard disks I mounted, the higher the wattage.
I have followed a few tutorials but that has only been a partial succes.
Code: Select all # hdparm -C /dev/sd[b-y]
/dev/sdb:
drive state is: active/idle
/dev/sdc:
drive state is: active/idle
/dev/sdd:
drive state is: standby
/dev/sde:
drive state is: active/idle
/dev/sdf:
drive state is: standby
All the drives can spindown but they are not doing that now that they are mounted.
hdparm:
Code: Select all/dev/disk/by-id/ata-SAMSUNG_HD103UJ_S13PJ9AQC12015 {
apm = 127
keep_features_over_reset = on
spindown_time = 60
[Code]....
Now there are two suggestions I found but both I was unable to implement.
The first suggestion was to mount using "noatime". However I do not know how to rewrite fstab because I am using ntfs for now (at least untill I get it working).
Code: Select all# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#
/dev/mapper/bugattidebian--vg-root / ext4 errors=remount-ro 0 1
[Code] .....
Not sure where to add the noatime there...
Also I am using samba on all those drives. This guide suggested a code change but the example does not line up with my configuration script.
Last month I found an old Seagate Hornet tape drive (STT20000A) with 2 TR-5 tapes at a thrift store. After sitting on a shelf at my place until last week I put it in an old system and installed Debian 5 on it. After a long time of working on it and never finding any useful help newer than 2007 I'm about to put it on eBay. So, here's a few questions:
Can this work in Debian 5 or should I put 4 or older on the system? If I put older linux on it, could I still get ide-scsi module working? apparently it has be obsolete for some time. The main problem is that it locks up the system when I try to write to it.
I am building a home server that will host a multitude of files; from mp3s to ebooks to FEA software and files. I don't know if RAID is the right thing for me. This server will have all the files that I have accumulated over the years and if the drive fails than I will be S.O.L. I have seen discussions where someone has RAID 1 setup but they don't have their drives internally (to the case), they bought 2 separate external hard drives with eSata to minimize an electrical failure to the drives. (I guess this is a good idea)I have also read about having one drive then using a second to rsync data every week. I planned on purchasing 2 enterprise hard drives of 500 MB to 1 GB but I don't have any experience with how I should handle my data
View 10 Replies View RelatedIts from a Synology Box with 3 disks, which one is damaged. But this disk wasnt in use.Take a look on the raid-size of 493 GB - and the both available disks with 250GB..)
On the others there were a linear raid. during this damaged disk the synology-device tells me, that the volume was crashed.But it look like, that this disk was not mounted into this volume.Quote:
DiskStation> mdadm --detail /dev/md2
/dev/md2:
Version : 00.90
[code]....
I am learning software raid 1 with centos 5.5. I created the raid with out any problems and removed the first drive to check there was no problems and it booted. I have installed the old drive back in the system as hdc and need to resync the drives (used old drive as partitions correct) I thought I could use raidhotadd but id does not seem to exist anymore. how I resync the drives in the array hda primary and hdc secondary using mdadm
View 1 Replies View RelatedThis is message I get when I try and start itmdadm: /dev/md0 assembled from 2 drives - not enough to start the arrayBelow is the information I've collected about any help on how I can get the raid back up and going to I can get the data off of it would be awesome
sudo mdadm --examine --scan -v
ARRAY /dev/md0 level=raid10 num-devices=4 UUID=91c36708:a7cbb532:5b51dc92:ba008491
devices=/dev/sdd1,/dev/sdc1,/dev/sdb1,/dev/sda1
[code]...
I have a total of 4 hdd's, 500gb 7.2rpm that I would like mirrored using raid 10. As you can see from the image, ubuntu 9.10 server isn't recognizing the full 2tb's. In fact, I'm not even sure about the configuration as I was thinking the HDD's would come up as four 500gb hdds. Instead I have the configuration above set and ready for Ubuntu to be installed on.
1. Is this typical of a server pre-configured from Dell(perc6 raid controller.
2.Why is ubuntu not recognizing the full capacity of the drives especially when it's a server install?
So, I have raid5 array with one spare disk. Is it possible to spin-off/shutdown the spare disk until one drive fails and the spare disk is needed?
View 1 Replies View RelatedI have been running a server with an increasingly large md array and always been plagued with intermittent disk faults. For a long time, I've attributed those to either temperature or power glitches. I had just embarked on a quest to a) lower case and drive temperature. They were running between 43 and 47C, sometimes peaking at 52C, so I've added more case fan power and made sure the drive cage was in the flow (it has it's own fan, too). Also, I've upgraded my power supply and made very sure that all the connectors are good. The array currently is a RAID6 with 5 Seagate 1,5TB drives.
When everything seemed to be working fine, I looked at my SMART logs and found that two of my drives (both well over 14000 operating hours) were showing uncorrectible bad blocks. Since it's RAID6, I figured, I couldn't do much harm, ran a badblocks test on it, zeroed the blocks that were reported bad, figuring the drive defect management would remap them to a good part of the disk and zeroed the superblock. I then added it back to the pack and the resync started. At around 50%, a second drive decided to go and shortly thereafter a third. Now, with two out of five drives, RAID6 will fail. Fine. At least, no data will be written to it anymore, however, now I cannot reassemble the array anymore.
Whenever I try I get this:
Code:
mdadm --assemble --scan
mdadm: /dev/md1 assembled from 2 drives and 2 spares - not enough to start the array
Code:
cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [linear]
md1 : inactive sdf1[4](S) sde1[6](S) sdg1[1](S) sdh1[5](S) sdd1[2](S)
7325679320 blocks super 1.0
md0 : active raid1 sdb2[0] sdc2[1]
312464128 blocks [2/2] [UU]
bitmap: 3/149 pages [12KB], 1024KB chunk
Which is not fine. I'm sure that three devices are fine (normally, a failed device would just rejoin the array, skipping most of the resync by way of the bitmap) so I should be able to reassemble the array with the two good ones and the one that failed last, then add the one that failed during the resync and finally re-add the original offender. However, I have no idea how to get them out of the "(S)" state.
Code:
mdadm --examine /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : d79d81cc:fff69625:5fb4ab4c:46d45217 .....
upgraded from karmic through update managerANDnone of of my external drives cd drive or flash drives are picked upad to go back to karmic and will remain there for a whil
View 9 Replies View RelatedI have two drive on my Ubuntu server. I have a 40GB IDE 5400RPM and an 80GB SATA 7200RPM.
Is it at all possible to RAID 0 the two of these drive? I know it's pretty unorthodox, but it's what I've got without having to buy anything.
If so, what are the limits, cons, and/or potential pros of doing a RAID of these two?
I recently had issues with the latest version of the Linux Kernels and I got that fixed but ever since that has happened none of my Drives will mount and they aren't even recognized.
View 1 Replies View RelatedSo I'm running proftpd on an old machine just for my own backup purposes, but I'm running out of space. I was wondering if it would be safe/efficent to set up an additional USB hard drive to the LVM drive that I have now? As in, would it write quick enough (USB 2.0), read quick enough and not corrupt data?
View 1 Replies View RelatedSomeone in my dept rather stupidly changed an IP of a webserver, and ever since we changed it back we cannot mount 3 NFS drives.
The Error
Code:
HTTP1:/etc# /etc/init.d/networking restart
Reconfiguring network interfaces...if-up.d/mountnfs[eth0]: lock /var/run/network/mountnfs exist, not mounting
if-up.d/mountnfs[eth1]: lock /var/run/network/mountnfs exist, not mounting
done.
I have removed that lock file and tried a
Code:
mount -a
but it just hangs?
The FSTAB hasn't changed at all, and the other web servers can mount to the NFS share fine. I have tried alot, removing the lock file and rebooting etc but no luck. Debian Lenny.
I have a RAID 1 that is mounted and working. But for some reason I can also see the individual drives under gnome Devices on gnome-shell. Is there a way to hide them from gnome or linux in general. (So only the raid 1 can be seen)
View 2 Replies View RelatedI was recently given two hard drives that were used as a raid (maybe fakeraid) pair in a windows XP system. My plan was to split them up and install one as a second HD in my desktop, and load 9.10 x64 on it, and use the other for mythbuntu 9.10. As has been noted elsewhere, the drives aren't recognized by the 9.10 installer, but removing dmraid gets around this, and installation of both ubuntu and mythbuntu went fine. On both systems after installation however, the systems broke during update, giving an "read-only file system" error and no longer booting.
Running fsck from the live cd gives the error:
fsck: fsck.isw_raid_member: not found
fsck: Error 2 while executing fsck.isw_raid_member for /dev/sdb
and running fsck from 9.04 installed on the other hard drive gives an error like:
The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
In both cases I setup the drives with the ext4 filesystem. There's probably more that I'm forgetting... it seems likely to me that this problem is due to some lingering issue with the RAID setup they were in. I doubt its a hardware issue since I get the same problem with the different drives in different boxes.
I want to make a RAID5 array with 4 2TB hard drives. One of the drives is full of data so I will need to start with a 3 disks and then once I copy the data from the 4th onto the array, I will then add the 4th drive. This will be my first experience with RAID. I've spent a few hours searching for info but most of what I have found is a bit over my head.
View 9 Replies View RelatedI have recently installed a Asus M4A77TD Pro system board which supports raid.
I have 2 x 320gb sata drives I would like to setup raid-1 on. so far i have configured the bios to raid-1 for drives, but when installing Ubuntu 10.04 from the cd it detects the raid configuration but fails to format.
When I re-set all bios settings to standard sata drives ubuntu installs and works as normal but i have just 2 x drives without any raid options. I had this working in my previous setup but thats because i had the o/s on a sepreate drive from the raid and was able to do this within Ubuntu.
I'm using 4 hard drives (1 of which is a sata drive) and i need help installing raid drivers i cant get these hard drives to mount at all
View 3 Replies View RelatedI've got a 10.10 installation, which I am using as a media/download server. Currently everything is stored on a 1TB USB drive.With the costs of disks falling, and the hassle of trying to back 1TB up to DVD (no, it's not going to happen) I was wondering if there's some linux/Ubuntu utility, which can use multiple disks to provide failover/resilience ... Could I just buy another 1TB drive, and have it "shadowing" the main, so that if one goes, I buy another, and then restore from the copy ?
View 3 Replies View RelatedI have a motherboard with the following chipset Intel 945GM + Intel ICH7R Chipset
This board: http://emea.kontron.com/products/boa...6lcdmmitx.html
I have two 320GB HDDs setup in hardware raid as shown below. But in gparted they are showing as two seperate drives. Why is this?
Raid setup:
GParted
fdisk -l
What am i doing wrong here?
I have a RAID 6 built on 6x 250GB HDDs w/EXT4. I will be upgrading the RAID to 4 2TB HDDs.
How would one go about this? What commands would need to be ran? I'm thinking about replacing the drives 1 at a time and letting it do the rebuild, but I know that would take a lot of time (which is fine). I don't have enough SATA ports to setup the new RAID and copy things over.
My two 400G drives which have been added to a single 800G array (per fastbuild bios utility) still show up as two 400G drives in fdisk. Why is that?
View 1 Replies View RelatedFor SATA drives in AHCI mode, the names are /dev/sdX, what about a RAID-0 or RAID-1 array of SAS drives? Are they the same?
View 8 Replies View RelatedI suspect this is not new but I just can't find where it was treated. Maybe someone can give me a good lead.I just want to prevent certain users from accessing CD/DVD drives and all external drives. They should be able to mount their home directories and move around within the OS but they shouldn't be able to move data away from the PC. Any Clues?
View 2 Replies View Related