RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia
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3answers
96 views
Disk 0 Failed in RAID-1 on Dell PE2950
I'm sure I probably know the answer to this question, and am just looking for some reassurance!
We have a Dell PE2950 with a RAID-1 (2 x 300GB) for the OS and a RAID-5 (4 x 300GB) housing some SQL ...
3
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1answer
39 views
How exactly does a SAS SFF-8087 breakout cable work? + RAID/connection questions
Please let me know if my question does not makes any sense as I am not sure if I am interpreting it correctly from my thoughts due to my lack of technical knowledge on this.
If I am using a ...
0
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0answers
8 views
HP P410i RAID Card - RAID1
HP P410i Raid Card.
I am waiting for a second hard drive to arrive.
Is it possible to start with 1 hard drive and enable RAID1 without loosing data when the second drive is installed?
0
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1answer
35 views
Intel RAID controlers and CPU processor [closed]
Looking at the configuration guide for the Intel Server Chassis / Intel Server Board dating "Junly 2012"(sic!), in the section of "Production RAID Controllers" it mentions "Supported in Single ...
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2answers
34 views
Centos RAID1 installation
I have installed Centos 6.2 with RAID1 support, after installation I have checked RAID1 by removing one by one Hard disk, Os booted and worked.
So after I created new users, installed LAMP, ftp and ...
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0answers
22 views
Using both raid from card and from motherboard [closed]
I have a motherboard, MSI 890GXM-G65 which support RAID 0/1/5/10. It has 5 SATA 6Gb/s. I'm planning to use this old system for a DIY NAS. I will be keeping a lot of data and mirror them. Currently, I ...
0
votes
1answer
32 views
How to get notified of mdadm RAID problems?
I am running Ubuntu 12.04 LTS. Yesterday I found a message in my mailbox saying that my server was shut down. I proceeded to reboot the system, but it didn't come up after many minutes, and I didn't ...
1
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1answer
44 views
How do I rebuild my software RAID 1 array after a drive replacement
So I have 1and1 dedicated host with RAID 1 setup. One of the drive went bad, and they had just replaced it with a good one. Now I need to the build, but I'm not sure which drive is the old one, and ...
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1answer
35 views
boot a non-raid disk on a server
I have a HP ML310e that I am trying to recover data off.
It has a RAID 10 array and I am wanting to boot a non-raid hard drive on the server.
I can't see this disk in the bios, so I can't boot from ...
0
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2answers
27 views
Increase the size of software RAID 10
Currently I have 8 disks each of size 32G forming a RAID 10. Now, I want to increase the size of this RAID by adding extra disks. This is a production device so there is already critical data in the ...
1
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2answers
58 views
Hybrid RAID with LVM + mdadm
So I've been looking Synology and their idea of Hybrid RAID to make mixed drive RAID arrays both fault tolerant and efficient.
So, I'm testing an idea (performance isn't a concern here), with a mixed ...
1
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1answer
54 views
Can I safely remove all disks of a synology NAS while its turned off?
I have a Synology 4-bay NAS (RS409RP+) with a RAID 5 installed on 4 hard disks. Now I need to upgrade the NAS to a bigger set of hard disks, and because these hard disks are 3TB each, I cannot use the ...
0
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2answers
57 views
RAID 1 hard disks errors, file system is not mounting
I have a Server with 2 HDDs in soft RAID 1, the OS is Debian Wheezy. After some database testing, the file system has gone to read-only mode, after which I have rebooted the machine. The server is not ...
1
vote
1answer
24 views
Managing PERC 6/i and P800 in the same system under CentOS
I have a CentOS/Xen VM server running on a PE T710 with a PERC 6/i, which has a 6 disk RAID 10 + 1 hot spare. The chassis only holds 8 3.5" disks, and so I'm looking for an aftermarket (used/eBay) ...
1
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1answer
23 views
IBM serveraid problems
When I start my server serveraid gives me this error: not responding properly Error 00D0
any help would be appreciated.
I can't find any information on this. Where can I go to get more information on ...
3
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3answers
190 views
What is the best way to copy 9TB of data to multiple external drives, sequentially?
The data is currently stored in a 9TB RAID array, with many users having many files and directories. We'd like to back it up to five 2TB external hard drives, but since we only have one free USB port, ...
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1answer
21 views
How to check 3ware raid controller's health?
I have a 3ware controller and I would like to check the health of the drives and the raid itself.
I found this blog: http://www.cyberciti.biz/faq/linux-check-health-of-3ware-raid-array/
but I ...
0
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0answers
31 views
Reconfigure from Raid0 to Raid1, is it possible?
currently I have Fujitsu tx140 s1p servers, one Tower and one Rack.
They are both running with the same hardware, configures the same way, so I'll just ask one Q for both.
They have an motherboard ...
0
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0answers
16 views
P2V Conversion When Existing System Is On A Raid Array
I asked this at Superuser but received negative votes so here I am. I want to know if it is possible to Virtualize a server that runs on top of a RAID1 configuration. I want to migrate the virtual ...
3
votes
1answer
101 views
Maintenance (TRIM) of SSDs in HW RAIDs
I have 2 ARECA 8040 HW-RAIDs, with 8 SSDs each. One is RAID10 with Intel 520 SSDs, the second is RAID5 with Samsung 840 SSDs. Both are connected to the Server with one shared LSI Logic / Symbios Logic ...
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0answers
26 views
How to hot mirror laptop disk onto external usb drive using kernel raid capabilities? [closed]
Please help me materialize my dreamed backup solution.
On my Debian (testing) laptop I'd like to be able to plug in my external USB drive (of identical size as my internal drive) and the system to ...
0
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0answers
37 views
why cant I set the correct partition size in fdisk
I am currently attempting to setup a raid array. At this point in time I am setting up partitions of the same size on each hard drive that I would like to use in the array, although when I used fdisk ...
1
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1answer
28 views
Why is my synchronized I/O so bad compared to direct?
I have two 3TB disks in a software RAID 1 setup and the host OS is 64bit Debian wheezy.
Issuing:
dd if=/dev/zero of=test bs=64k count=3k oflag=direct && rm test
Yields:
201326592 bytes ...
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2answers
49 views
How do I resize full root or swap partitions in RAID?
It all began a couple weeks ago:
When I try to use vi I get "E297: Write error in swap file
$ echo "test" > test produces -bash: echo: write error: No space left on device
My bash history is ...
0
votes
1answer
29 views
“LV Status NOT available” after converting root from lvm2 to lvm2+raid1 (lvconvert --type raid1)
I just converted by lvm2 root filesystem from linear lvm2 (single HDD:sda) to lvm2 raid1 (using lvconvert -m1 --type raid1 /dev/ubuntu/root /dev/sdb5 command). But after this conversion I can't boot ...
1
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2answers
56 views
Dell PERC H700 and 8 disk slots : what are my options to increase disk fault tolerance?
We've got a Dell PowerEdge T510 which has 8 disk slots in the front. It is currently utilising 6 of these slots, and the disks are controlled by a PERC H700 controller. The disks are currently running ...
0
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1answer
40 views
Solaris not seeing FC volume
We recently replaced a failed controller in an AL connected RAID. I wasn't the one that replaced the controller, but apparently when the new controller was installed something weird happened with the ...
0
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4answers
171 views
High speed storage drive (over 8 GByte/s) [closed]
Looking for a windows based solution to create a high performance, 8 GB/s storage array.
Either by striping together dozens of SSDs, or by create multiple RAID arrays and somehow pooling them ...
1
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0answers
53 views
Dynamic Disk Pooling (next-gen RAID): any experience? [closed]
I recently read this paper from Dell about DDP aka Dynamic Disk Pooling.
Quickly explained, it offers these characteristics:
no reserved hot-spare (all disks contribute to IO and redundancy),
...
0
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1answer
24 views
Intel S5520UR and Raid activation key
If I add Raid Activation Key:
AXXRAKSAS2
and Memory:
AXXMINIDIMM512
To the S5520UR Intel motherboard, it enables:
"enables full intelligent SAS HW RAID for the Intel Servers with a
...
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1answer
30 views
detecting hrd drives on server without raid controller
I have a basic question. I have a server with 4 separate disk installed with ubuntu OS. The server does not seem to have raid controller. Is there a way to work with all the 4 disks, that is mount ...
0
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0answers
21 views
Issues while installing Windows 2008 on Wipro NetPower z2501r server with hardware RAID
Our organization has a Wipro NetPower z2501r server. I have been told that hardware RAID has been enabled in the system and I need to install Windows 2008 server on it, but the system is not detecting ...
0
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0answers
30 views
Reconstruct deleted virtual disk in PERC 710 RAID Array
Today, I did the dumbest thing I've ever done in my life. I have a PowerEdge server with a PERC 710 RAID controller. I had 4 drives in RAID 5 configuration (1 2.7 TB Virtual Disk) and I wanted to ...
1
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1answer
56 views
Safely migrate from 3ware 9650SE-8LPML to a 3ware SAS 9750-8i?
I have a server with a potenially faulty 3ware 9650SE-8LPML. I can log in to the server but the interface keeps reseting causing the whole system to lock down for minutes.
My host suspects its the ...
0
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0answers
45 views
P2000 G3 for VMware - one vDisk, Multiple RAID levels?
I have a dual controller P2000 G3 (SAS 6GB) hooked up to 3 ESXi hosts.
There are 12x 600GB 15k rpm drives total, and I have set them up in 1 RAID10 vDisk to maximize performance+reliability. The ...
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0answers
41 views
NTFS Allocation Unit Size and RAID Stripe Sizes [closed]
When would you want to change the Allocation Unit Sizes of a volume from the default on server 2008? The default I believe is 4012 Bytes (4K). When would you want to change the RAID stripe size? Do ...
0
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2answers
84 views
Very poor performance on LUKS/LVM/RAID combination under Debian Squeeze
I have the following issue: I have an encrypted partition on a lvm on a plain partition on the hd. Now I craeted a RAID array to increase the performance. That means, that I have the following stack: ...
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votes
2answers
33 views
Should a LInux Software RAID device contain a Partition Table? [closed]
I created a RAID-1 Device using the following command:
root@raspberrypi:/home/ozn# mdadm --create --verbose /dev/md0 --level=mirror --raid-devices=2 /dev/sda1 /dev/sdc1 --spare-device=1 /dev/sdd1
...
1
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1answer
48 views
Intel ESRT2 RAID array is not recognized by Debian
We have a new server here with an Intel Server Board S1200BTL and I'm trying to set up a RAID 1 for data storage. I have Debian 6 installed on an SSD, and two 2TB hard drives that are supposed to be ...
1
vote
1answer
62 views
Are RAID disks really universally unsupported for VMWare converter
I am preparing to virtualize our DC, which runs on SBS2008. We have eliminated the >2TB GPT disks and prepared some disk level backups with Acronis to use for the conversion. I plan to use the VMWare ...
1
vote
1answer
72 views
100% SSD usage Linux
Every 20-30 seconds my HDD usage goes to 100% (iostat).
iotop is showing that [flush-8:0] is using 99% HDD during these times. In between HDD usage is 1-10%.
iostat output:
04/22/2013 08:58:44 AM
...
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3answers
98 views
Raid 0, Raid 1, Raid 5, Raid6, Raid 10 Read/Write performance? [duplicate]
Assume a single disk has a baseline of 1W & 1R performance, how does the different RAID configurations behave?
My initial guess:
Raid 0: 2W 2R
Raid 1: 1W 2R
Raid 5: ? ?
Raid 6: ? ?
Raid 10: ...
0
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1answer
70 views
HP SmartArray P212 disabled, cache module not attached
I have a DL180 G6 server with Smart Array P212 RAID controller. The server runs under Ubuntu. After an upgrade from Ubuntu 10.04 to 12.04 utility hpacucli (ver. 8.50-6.0) stopped working. The error ...
1
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2answers
63 views
Equallogic partitioning: pools, allocations, etc
I have some new budget coming up to buy an Equallogic PS6110xv. This unit has 24x600G disks and I'm looking at different ways of setting it up.
The two primary uses will be VMs and MySQL.
MySQL: ...
0
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1answer
36 views
LSI RAID not synchronizing
There is a HS22 Blade with RAID. I removed one of the mirrored disk, and used it for other, but now I'm inserting it back, but it doesn't sync from the working disk.
cfggen shows the following:
...
0
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0answers
29 views
Reconfigure RAID volumes
I do have one IBM SystemX 3550 M3 machine with me, installed with ServeRAID M1015. There are 4x500GB HDD attched to the RAID controller and are mounted as /, /storage1, /storage2, /storage3. / is ...
2
votes
0answers
39 views
HP DL380 G7 RAID controller detecting bays incorrectly - port or mobo?
I've been passed a DL380 G7 which appears to work fine (all usual checks come back OK, Linux boots OK, LV creation is OK and disk access is OK) -- except the left hand four bays connected to port 1 of ...
0
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1answer
55 views
RAID Level Recommendation [closed]
I have just purchased the Dedicated server with the following specification.
XEON 3.46GHZ 2 CPU
64GB RAM
6x300 GB Harddrive
I wanted to know what RAID level should be installed with these ...
0
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0answers
34 views
Linux MD Raid not removing faulty device mapper member
I am having strange problem with my Linux md raid setup. I have one rather old (Fedora 6 with 2.6.22.14) linux box serving disks via iSCSI.
The disk itself is partioned via custom made device mapper ...
0
votes
2answers
96 views
High %wa in top on KVM host
I have a server running several KVM virtualized guests that's reporting a high %wa in top. The server hardware is as follows:
4x2TB in hardware RAID10
64GB RAM
Dual E5-2620
top output
% top - ...
