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

learn more… | top users | synonyms

4
votes
2answers
2k views

Issues with Server 2012 using DFSR running on Hyper-V 2012

We have a number of Server 2012 systems, all of which run virtualised on Hyper-V 2012 server. We are having problems with two such virtual instances, both of which are used as file servers, whereby ...
0
votes
2answers
264 views

SSD suddenly full

Today the hard drive of our server was suddenly full. The disk usage always stayed around 50 % in the weeks and months before (old data is regularly expunged from the server). I deleted 10 GB of ...
2
votes
2answers
817 views

disk space keeps filling up on EC2 instance with no apperent files/directories

How come os shows 6.5G used but I see only 3.6G in files/directories? Running as root on an Amazon Linux AMI (seems like Centos), lots of free memory available, no swapping going on, no apparent file ...
0
votes
2answers
583 views

Safely resizing partitions in CentOS 6

I have deployed two VMs on VMware with CentOS 6.3 Net Install. It has automatically created some partitions. It has created two major partition for root and home. root partition has size of 50GB and ...
0
votes
1answer
142 views

Using second eSATA port for second DAS

I have a server with a HP M60 12TB disk array attached. The server and disk array both have 2 eSATA ports in order to connect 2 cables to double the throughput, but I am wondering if it is possible to ...
2
votes
2answers
111 views

Is it reasonable that a random disk seek & read costs ~16ms?

I am frustrated about the latency of random reading from a non-ssd disk. Based on results from following test program, it speeds ~16 ms for a random read of just 512 bytes without help of os cache. I ...
0
votes
1answer
48 views

Does soft link affects xml parsing and database process

I have a php code that does an xml parsing and inserts data into the mysql database. The code can process one xml file in an average of 18 minutes. Since I will be having lots of xml files and ...
-1
votes
3answers
171 views

Ubuntu webserver is out of space

Apparently, I was using xvda1 disk which is out of space. How do I change the /etc/fstab so that I can make my xvda2 for top level, and xvda1 as additional resource? It's an EC2 instance: root@~# ...
2
votes
1answer
503 views

Mount a partition to two mount points

I have a partition called sda4. And I want to store the mysql data and xml files on that partition because the partition which mysql and domain are installed has little space. So I'm planning to ...
0
votes
1answer
1k views

resize root partition without using live cd and lvm [duplicate]

Possible Duplicate: Do partitions needed to be unmounted when resizing a partition? I want to know if it is possible to resize an existing root partition without using live cd. The server ...
0
votes
2answers
506 views

Disk Activity Alert Windows SBS 2003 on Dell PowerEdge 830 with Raid

Background: I have a Dell PowerEdge 830 Server running Windows SB Server 2003. It has 4gbs of RAM and a ATA CERC SATA 6CH controller with 3 160gb drives in a Raid 5 configuration. The Problem I am ...
3
votes
1answer
3k views

Server 2012 Core (no GUI) - How to manage disks?

I am working on Server 2012 which doesn't have a GUI. For now, I have two hard disks. My first one is already formatted and I see it as C: Now, I'd like to format my second hard drive and create a D: ...
1
vote
1answer
470 views

How to Mount remote disc as local in Windows 7 and Windows 2003?

Is it possible to mount remote file system (on Windows 2003 server) as local disk in Windows 7? I have Windows 2003 server with software RAID and some shares. On another computer with Windows 7 I have ...
0
votes
1answer
140 views

Disk speed test linux

Is there any simple command (or tool) to test the speed (MB/sec) of disk access? I've found hdparm but It look it only works for local disk. I need to evaluate the speed of remote NFS-mounted disk. ...
0
votes
1answer
289 views

Proxmox VE Logical Volume in RAW format?

I added a Volume group in Proxmox VE as Storage for KVM VMs. A new Logical Volume will be created for each VM, but in Proxmox VE under The Defined Storage which shows list of created Logical Volumes I ...
-3
votes
1answer
49 views

number of disks for RAID config vs. effect on performance? [closed]

I was wondering how the number of disks used for RAID configuration affects performance? I know that it takes longer to rebuild data, but are there any other performance areas affected??
11
votes
4answers
2k views

Available disk space on Unix/Linux OS

How to get available disk space on Unix/Linux OS, including unallocated space (which wasn't assigned to any partitions)?
2
votes
2answers
144 views

Do we need to perform disk checking periodically on Linux

Do we need to perform periodic disk checking,for bad blocks and bad sectors?. Our servers havent been restarted for last 4 months,also no disk checking have been performed on any disks. Can that can ...
-3
votes
2answers
582 views

I have a HD with bad sectors, can I configure windows to only retry a failed read once? [closed]

I have a bad HD (numerous bad sectors) I'm attempting to get some of the data off, however Windows keeps trying to reread the bad sectors - resulting in a really really long wait time can I ...
1
vote
3answers
2k views

RAID10 without write-back cache = horrible write performance?

I have just provisioned a dedicated server on singlehop. I'm running it through some tests to know what to expect performance-wise. On the I/O side (with 4 1TB disks in RAID 10) I get: write-cache ...
2
votes
1answer
73 views

mount hardware raid disk 1 with one disk and no hardware raid controler

I have one of two raid disk (from LSI raid card) There is a way to mount it in a PC and access to the disk without the raid card? Maybe mounting or skipping the first bytes!? Thanks in advance. ...
-1
votes
2answers
1k views

Shrink a Windows VM in XenServer

I faced a problem. I deployed a VM by size of 500GB on Citrix XenServer and now I want to shrink it, because I don't have enough space for snapshots. Now I want to perform an export/import to do this. ...
1
vote
2answers
1k views

How iostat figures out to take CPU idle time to consider as %idle or %iowait?

I was going through iostat man page. According to it, %iowait Show the percentage of time that the CPU or CPUs were idle during which the system had an outstanding disk I/O request. %idle ...
1
vote
2answers
494 views

Refresh /dev/sdx list

I've been messing around with my storage array (in that case 2xMD3000 SAS) and between the scans/rescans/delete/add my /dev/sdx block devices are all messed up. Some of them are non existent and using ...
5
votes
2answers
1k views

Disk (EXT4) suddenly empty without any sign of why

I have a Ubuntu 10.04 server with several disks in it. The disks are setup with a union filesystem, which presents them all as one logical /home. A few days ago, one of the disks appears to have ...
1
vote
1answer
80 views

I need to mount directory from one hdd to public_html folder [duplicate]

Possible Duplicate: Hard drive on server which hosts public_html folder is full. What to do? i have a hard drive (1TB) which has a folder named "flvideo2" i need to mount into ...
1
vote
1answer
583 views

Controlling mdadm faulty disk rebuild order in RAID 10 array

I have a Linux mdadm RAID 10 array comprising of 6 (SATA) disks configured with n2 copies. While pulling out one disk, another one in another mirror pair failed. Leaving me with: $ cat /proc/mdstat ...
1
vote
2answers
135 views

Disk space profiling in Unix

I'm looking for a tool to summarize how disk space is being used on very large partitions. Our file system is around 950TB, mostly broken up into 20TB partitions. There are some really nice graphical ...
3
votes
0answers
44 views

How can I measure disk cache churn on Linux? [duplicate]

Possible Duplicate: Is there a way to get Cache Hit/Miss ratios for block devices in Linux? I have a file server which serves out large (25GB-1TB+) files over the network from local ...
0
votes
1answer
70 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
3k 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
743 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
507 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
137 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
263 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
914 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
942 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
260 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
433 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 ...
10
votes
3answers
586 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
153 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
636 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
140 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
2k 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
2k 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
125 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
207 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
597 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 ...