Disk storage is generally the permanent data storage of a server.

learn more… | top users | synonyms

0
votes
1answer
66 views

Find out who is using what disk group [closed]

I would like to find out which databases/processes are using which disk group. I was notified that our Disk I/O was starting to get pretty high. I'm on a Solaris box (Sun - Fire 15000) running Solaris ...
0
votes
2answers
2k views

Is there any way to shrink qcow2 image without converting it raw?

Is there any way to shrink qcow2 image without converting it raw? I cannot convert it to raw because I don't have disk space enough for raw image.
1
vote
1answer
2k views

how to enlarge disk space on /dev/xvde1 for AWS ec2 instance?

I created an EC2 instance with type of m1.small and later found it's lack of space. I then stop the instance and change the type to m1.xlarge. However, I have no luck on getting more space. df -a ...
2
votes
3answers
658 views

ZPOOL Mirror setup

What is the best setup for an zpool intended for database big inserts or TCP/IP dumps (i mean sustained high write throughput using 4 disks ? I want buy 4 Wd RE4 2TB drives and get the more power i ...
2
votes
3answers
441 views

Exchange 2010 VMDK disk design

I am deploying Exchange 2010 on a single server on my VMware/SAN. We have about 100 mailboxes. I will be using normal VMDK disks, so my question is about the disk design. Should I put everything on ...
1
vote
1answer
134 views

Linux RAID: Replacing Failed Drive…permanantly

Okay, odd question here. I have a server with RAID 5. A drive failed, in a really physically in a really odd way. On the machine it boots and is seen by the BIOS but...no partition can be seen on the ...
4
votes
1answer
235 views

Can I generate I/O activity with a max (throttled) throughput?

For example, is there a tool or method where I can say (for example) "generate up to 50 MB/s of read activity to this file, but no greater"? Or configure a tiny delay between read operations, which ...
5
votes
1answer
784 views

No space left on device — but there is space

I'm running an Ubuntu 12.04.1 server in a VMware virtualized environment that has a strange issue. Twice now, at seemingly random times, the machine has suddenly been unable to write to the root ...
2
votes
1answer
896 views

Debian: nginx using an extreme amount of disk I/O

We're currently haveing an issue with one of our nginx servers. It's using an extreme amount of disk I/O. It's the / (root - cciss/c0d0) partition that's being abused. See picture of iotop here: ...
0
votes
2answers
239 views

Using dd command and running out of space while cloning drive to img

I have a problem with drive cloning. Im using dd on damaged disk with bad sectors trying to make an image from it. Im booting computer with Live Linux CD . Damaged disk: sda 146GB (NTFS) External ...
1
vote
1answer
386 views

How do I measure and compare disk performance of my Hyper-V Windows VM?

I'm not sure whether this sounds stupid or lazy, but I'm really not sure. I have a problem with the performance of a VM setup (2008R2-64bit Hyper-V running a 2003R2-32bit Windows server) and I'd like ...
9
votes
3answers
529 views

Slow filesystem access

I'm trying to diagnose a slow filesystem issue on a server I look after. It's been ongoing for quite some time, and I've run out of ideas as to what I can try. Here's the thick of it. The server ...
-5
votes
2answers
152 views

VMWare - how can I access a “shared” “partition” from within a VM? [closed]

I'll be using a VMWare VM, and from within the VM I need to be able to save files to a directory which exists outside of the VM. I'm running VMWare NOT inside of a host OS though. Is this possible, ...
0
votes
2answers
604 views

How to analyse performance ESXi NFS Copy between datastores

I'm having trouble with ESXi backup/restore performance. My setup: VMWare ESXi 5.0.0 on a HP ProLiant DL 360 G6, runnnig RAID 5 on a P410 SmartArray as SAS QNAP Nas (QNAP TS-809U-RP NAS 8 bays ...
3
votes
2answers
123 views

LOCK/Password Protect home partition

I have access to a server with SSH and for some reason I want to LOCK/Password protect or encrypt the home partition. Its very important for me to do it in the best possible way, I don't want anyone ...
3
votes
2answers
1k views

Rebalance CentOS / RHEL Ext4 LVM assignment

Our corporate standard is CentOS (which seems to prefer LVM), and I come from primarily a non-LVM background, so I'm treading new ground with this issue. I inherited an older machine as a log-server ...
3
votes
3answers
1k views

Determining disk space usage & file counts for extremely large data sets (any tricks?)

Long time reader, first time asker: I'm a junior-level Linux admin who's increasingly supporting very large data sets/stores on local & NFS storage. The data is generally in the form of massive ...
2
votes
3answers
123 views

Copying Files Gives Disk Lag

I have some Game Server services running on my Debian 6.0 64-bit Custom Kernel machine. I lag on my currently running services whenever I install a new service. Installing a new service just ...
5
votes
3answers
1k views

Linux different size for df and du for root partition

On my CentOS server, both of the commands are showing different usage for disk / , df shows this output: Filesystem Size Used Avail Use% Mounted on /dev/xvda2 16G 14G 952M ...
1
vote
1answer
195 views

optimizing ext[234] for small file throughput

I have a system that has a high throughput of small files on disk, i.e. a huge number of small files are created, written and deleted within seconds. Are there any reasonable ext2/ext3/ext4 mount ...
3
votes
2answers
489 views

Linux disk usage analyser that acts like symlinks are real files

I am using git-annex, an extension to the DVCS git, which is designed for handling large files. It makes heavy use of symlinks. The actual large files are moved to the .git/annex directory and the ...
0
votes
1answer
100 views

Disk array for virtual machines [closed]

Is there any recommened array for placing the disks of a virtual infraestrcture. As example, I heard that for the OS disk is recommened a mirror array. For placing virtual hard dkis which is ...
7
votes
2answers
289 views

Disk latency is growing since a few days ago, with no special change in disk throughput

Here is the disk latency graph of my server. The server has two 5400 RPM 32MB Cache SATA 3.0Gb/s hard drives mounted with software RAID 1 configuration. No special changes has happend in those days ...
6
votes
1answer
121 views

How to prevent IO Load under Linux for Video serving?

I'm currently serving videos of conferences via Nginx on 3 servers; 4 cores, enough memory (no swap used) and RAID-10 with 8 drives per server. Unfortunately iostat -xd 1 gives me 100% on all 3 ...
0
votes
3answers
2k views

How to disable barriers?

It seems impossible to disable barriers. I have tried loading the kernel with "mount -o barrier=off", "mount -o barrier=0", "barrier=off" and "barrier=0". The kernel is Atomic Secure Linux 2.6.32 with ...
0
votes
1answer
300 views

Creating a new Partition on Centos Linux

I installed a Centos and partitioned it as: /root - 100MB / - rest of the disk. I need to have a /log partition. is it possible to do it after the Linux was already installed? Thanks!! Dotan.
-4
votes
1answer
131 views

xenserver 5.6 without raid [closed]

The domU in my environment is a xenserver 5.6 fp1 installed on a regular desktop with intel board and i3 processor. I have 8GB or RAM installed and 1 500GB SATA HDD. Obviously, i don't have RAID and ...
0
votes
2answers
906 views

smartd: Device: /dev/sda, FAILED SMART self-check. BACK UP DATA NOW

System: Centos 5.5 64bit RAID: Linux Soft RAID with 2 Disks Mirror Smartd complains about the disk failure in system log: [root@xxx ~]# tail /var/log/messages Jul 3 10:22:45 w11 smartd[6043]: ...
0
votes
1answer
57 views

Convert basic disk to dynamic

I have a Windows server 2008 system with 2 x 40 GB SSD hard disks. On first disk I have the OS installed and the second disk is unallocated. I want to mirror the OS on second disk using software RAID. ...
4
votes
4answers
3k views

Are new HP Gen8 servers compatible with g7 drives?

Are HP Gen8 servers (namely DL380 Gen8 with 2.5" HP disks) compatible with 2.5" harddrives from G5-G7 servers? I mean original HP disks in HP caddies not plain SAS/SATA drives.
1
vote
2answers
1k views

gzip “No space left on device”

Using gzip 1.3.12 / ubuntu 64bit I am getting "No space left on device" yet there appears to be plenty of disk space remaining. gunzip 03-05-2012--22-52-01.tar.gz gzip: 03-05-2012--22-52-01.tar: No ...
-1
votes
1answer
56 views

does my machine configuration make sense? [duplicate]

Possible Duplicate: Can you help me with my capacity planning? i couldn't think of a better place to ask this question, so here it goes. we're putting together a dedicated server for a ...
2
votes
3answers
130 views

Recovering data from a damaged disk

So have this problem. Have a 500G disk with data that has crashed. I need to recover data. I used ddrescue to first create an image and I have recovered 455G to that image. Now, I do not know what ...
15
votes
1answer
1k views

In Linux, why isn't superuser root's folder under /home?

You can create a user that has privileges like root, and it's home directory will fall under /home/username. Why does root get its own folder at the top level of the file system? Is this just ...
2
votes
3answers
455 views

Relayout LVM Disk

I have an Ubuntu 11.10 system with two 500GB disks. The partition tables look like this: /dev/sda1 primary 465.52GB /dev/sda2 extended 243.17MB -> /dev/sda5 logical 243.14MB ...
4
votes
1answer
5k views

Mixing dual and single port SAS disks

I have a HP DL380 G5 with 8x146GB single port SAS SSF disks (DG146ABAB4). A couple of them have failed and I can't find any new single port disks anymore. They all seem to be dual port. I'm wondering ...
3
votes
1answer
155 views

Is WinSAT reliable to test the speed of my iSCSI, Fibre SAN, under bare metal or Virtualized?

I discovered the following command in this whitepaper: WinSat disk -read -ran -ransize 4096 -drive c Is it reliable to use against a SAN, or iSCSI drive? I would like to compare the output of ...
3
votes
4answers
1k views

What does “random seek time” really means in HDD benchmarks?

I am currently benchmarking a hard drive. I am using HW32 for the measurement. The result has two parts: random seek time: 20 ms random read throughput: 30 Mbytes/s I am not sure the methods HW32 ...
0
votes
2answers
179 views

How create ghost images and copy to many drives [closed]

I am looking for the cleanest and most reliable solution to create ghost images of a windows 7 based machine and copy these images to multiple hard drives. I am looking for the software needed to ...
1
vote
2answers
79 views

Can I mount another drive to “/”, act like adding additional disk to “/”

System: Ubuntu Currently, the server has 50G disk, df output as below. Filesystem 1K-blocks Used Available Use% Mounted on /dev/hda1 49448752 1445164 45491668 4% / ...
1
vote
1answer
484 views

Switch disks to another identical HP ML360 G6 with P410i array controller

In case of hardware failure, for example motherboard/processor, is it possible to put the disks of a raid 1 into a spare server to be back online asap. If a disk failes and i want to use a disk of ...
3
votes
1answer
599 views

Freshly formatted ext4 drive appears to have several gigabytes already used

I have setup several drives in an Ubuntu 12.04 x64 machine by deleting all the partitions and formatting them as ext4 with fdisk, but when I ran df -h, it showed me that a substantial amount of the ...
0
votes
0answers
128 views

CentOS Volume Group remount after reboot

Using centos 6.2x86_64 /dev/sda is primary disk /dev/sdb is secondary disk. The volume group size of /dev/sda was not enough so i increased the size of volume group using vgextend command. It was ...
1
vote
1answer
2k views

How to mount encrypted volume at login (Ubuntu 12.04, pam_mount)

I'm trying to get pam_mount working on Ubuntu 12.04. I have /dev/sda1 (encrypted partition) with /dev/dm-1 (ext4 formatted) inside it. Should ~/.pam_mount.conf.xml be trying to mount /dev/sda1 or ...
1
vote
3answers
64 views

Adding a new drive on a Linux database server

This is a general question to optimize performance, reliability, and consistency. I know that both of these methods work, I'm just wondering if there are (dis)advantages to one over the other. ...
6
votes
2answers
12k views

How can I connect a SAS drive to USB?

I have a Dell T710 with Seagate Cheetah 15k.7 SAS disks. If the T710 motherboard dies, I'll need to resort to one of my nightly off-site backups and salvage the journal/logfile from the SAS disk to ...
2
votes
4answers
286 views

Missing drive space in Server 2003

I have two drives used for SQL backups which for the last week have been acting strange - the free space indicated by windows is far off from what windirstat, etc indicates. There should only be about ...
0
votes
1answer
488 views

Short write and read speed disk benchmarking

We're using cloud hosting for some of our backend servers and we noticed that performance on the disks (which as confirmed by the provider are shared with other customers) vary depending on the ...
-2
votes
1answer
41 views

Disks online through power pull, replace? [closed]

Suppose you had a server cabinet and the power was pulled on the whole thing (this just happened to us). Now suppose you had a hard drive (3.5" SATA WD Enterprise) that was not previously in use. It ...
0
votes
2answers
1k views

Meaning of LED signals in SATDOCK22RE disk duplicator by StarTech

We've just received a disk duplicator from StarTech - the SATDOCK22RE. It looks like a nice system, but the manual is not clear about the various signals that the LEDs show. Specifically, after we ...