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

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2
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1answer
50 views

How to dump data written to disk

Question : How to dump data (byte-stream) written from an application to the filesystem ? (something like tcpdump but for IO/file). Ideally it should be able to "attach" and dump the stream while it ...
0
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1answer
235 views

MySQL Corrupt Table - No Space left - Index File too big

I noticed that one of my servers was running out of disk space, due to heavy MySQL usage. I stopped everything using the database, freed up some space and restarted mysqld. Now, I checked my table ...
3
votes
1answer
1k views

Find current IOPS usage of EBS volume from my application on AWS EC2

I am relatively new to AWS and disk performance. I am trying to figure out how much provisioned IOPS does my application need to perform well. Currently My PHP and MySQL application is hosted on EC2 ...
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2answers
64 views

Formatting a new disk partition

I just added a new raid1 volume to my Windows 2008 server. The raid sync has just completed so I want to format it. I got this message: That disk will be used just for storage, no need to boot ...
0
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1answer
60 views

Does regularly running smartctl negatively affect disks?

I have many servers in different data centers. Lately I had some disk failures that I probably could've detected beforehand, so I started automatically running smartctl -t periodically on each disk. ...
1
vote
1answer
289 views

MySQL Extremely High Disk Activity (Read Operations)

I have 1GB Linode VPS with a standard LAMP stack. Apache is tuned fine but for some reason MySQL's disk usage is high. This is causing really slow site load times. RAM and CPU usage are fine. Can ...
1
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1answer
1k views

HP Proliant ML350 G5 E200i Hard Disk get amber light after firmware Update

I have an HP ProLiant ML 350 G5 with E200i Controler running Windows Server 2008 R2 x64 It have four disks drives models DG072A9BB7 firmware HPD0, with two logical drives C: and D: booth with raid ...
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2answers
879 views

Why do I get “No space left on device” when running mail

First of all I've checked these two solutions on serverfault but I'm still having issues. Here's my problem: root@myserver:/# mail /tmp: No space left on device Firstly I checked the filesystem ...
41
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6answers
18k views

How can I successfully mount an 8-bit SCSI drive on a modern computer?

I have a number of internal 8-bit SCSI-1 drives that I'd like to archive for historical purposes. These are all the old NeXT Cubes and NeXTStations (monochrome and color) that were used by id ...
1
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3answers
90 views

Simple way to extend server disk capacities

What's the least cumbersome way to extend existing server's storage capabilities? I have a SuperMicro custom server and a Dell PowerEdge 2950 and I would like to extend their storage with budget hard ...
2
votes
3answers
167 views

How do I determine the number of seeks performed on Linux?

I have two programs that write to my servers disk. One I wrote, it does linear writes, it's writing data quickly. Another I'm benchmarking, it's writing data at a 3rd of the speed. It doesn't do much ...
1
vote
1answer
378 views

IOPS write increased, Disk write latency decreased, Avg req size decreased - Page load speed decreased

I have noticed decrease in server performance (page load speed become lower), then I went to investigate and have found in munin graphs (which tracks server's resources) that there was big changes on ...
0
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2answers
75 views

Historical data / logs on what RAM and disk storage used to be in Linux? [closed]

Is there any historical data / logs in my VPS that can show what the RAM and disk storage used to be? My hosting provider reduced my RAM and disk storage from 1.5GB and 150GB to 1GB and 100GB ...
26
votes
2answers
5k views

Why are enterprise SAS disk enclosures seemingly so expensive?

I will begin by stating that I do not believe this is a duplicate of Why is business-class storage so expensive?. My question is specifically about SAS drive enclosures, and justifying their expense. ...
1
vote
0answers
435 views

udisks-daemon eating up all my memory

I'm operating a little storage server on debian, over the past months I've noticed the process udisks-daemon eating up almost all available memory. Is this just really aggressive caching or a memory ...
5
votes
1answer
281 views

Identify which process is responsible for heavy disk i/o under FreeBSD

I wonder how I can monitor which process takes out all my IO bandwith. The only command i know is gstat but it shows cumulative info. Is there any tools i can use to inspect the running processes for ...
2
votes
3answers
453 views

Disk write speed much slower than read speed

I have a VPS server (WiredTree), running CentOS. After experiencing some performance issues I created a simple benchmark for disk read/write speed using the following script: echo Write to disk dd ...
2
votes
0answers
192 views

Is retriving data on SAN is fast versus storage on local disk? [closed]

I work in a company, where I was lately having discussion with folks from system engineering and the security team on topic of fast data access in terms of (IOs) performed over the network (SAN) ...
3
votes
2answers
4k views

Windows Server 2008 R2 reports full disk, but files do not add up

I have a web server running Windows Server 2008 R2 Enterprise. It's C:\ drive is 100 GB in size. We started getting errors from IIS and discovered that the C:\ drive, surprisingly so, was reported to ...
0
votes
1answer
145 views

Merge Unallocated Space BEFORE partition (W2K8R2)

My Windows Server 2008 R2 Disk Management looks as follows: 100 GB 100GB [Unallocated][(C:\)] X Y I accidentally installed Windows into the second partition (Y) ...
3
votes
1answer
3k views

Proliant server will not accept new hard disks in RAID 1+0?

I have a HP ProLiant DL380 G5, I have two logical drives configured with RAID. I have one logical drive RAID 1+0 with two 72 gb 10k sas 1 port spare no 376597-001. I had one hard disk fail and ...
3
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
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2answers
245 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 ...
1
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2answers
507 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
453 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
131 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
100 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
44 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
144 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
335 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
448 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
2k 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
397 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
133 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
260 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
48 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
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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
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2answers
139 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
488 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
1k 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
63 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. ...
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votes
2answers
796 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
855 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
360 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
77 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
426 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 ...
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2answers
122 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
43 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 ...