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

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2answers
156 views

Partition keeps filling up, don't know why

My partition /dev/sda1 keeps filling up. Besides the "/" directory, I cannot tell what directories are even on this partition in order to search for files to delete. I was able to get it down to 97% ...
4
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1answer
86 views

No option to create new partition- why?

Why can't I create a new partition as per below? This is the disk of a physical server running Hyper-V 2012. Any help appreciated!
2
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2answers
301 views

Using a DL380p Gen8 and D2700 Disk Enclosure

We've got a DL380p Gen8 with 16 slots for 2.5" drives, and we're running out of storage space. So what I'm looking at doing is replacing all of the current drives (some are 300GB, some 600) with ...
2
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0answers
159 views

Convert single O/S disk to RAID 1 - Ubuntu 12.04 LTS

I have a server running Ubuntu 12.04 LTS with only a single drive. There are 2 more empty hot swap bays in the chassis. I want to add a little redundancy by adding a RAID 1 to the system. The ...
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1answer
40 views

how to partition with Windows disk management tool? [closed]

There is 100 GB in my C:/drive,i want to split it into several disks to make my PC works more smoothly .It is said that Windows has its own disk management tool. but i heard it's complex and limited ...
2
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0answers
296 views

iscsi disk over 2 TB cant initialized

I have a windows server 2012 x64. I'm free to connect and initialize the disks smaller than 2 TB. I can connect more than 2 TB disk but I can't initialize it? Windows can not determine its size, the ...
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0answers
144 views

Why Wmi info for disk size is wrong?

i am expecting a very curious problem. In a script collecting disk infos on a list of W2008 servers, i realize that, for some servers, the Wmi info for the disk size is wrong. My Powershell command: ...
1
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1answer
4k views

Is it possible to on-line shrink a EXT4 volume with LVM?

Today I tried this on my machine with OpenSUSE 12.3 (kernel 3.7): # resize2fs /dev/mapper/system-srv 2G resize2fs 1.42.6 (21-Sep-2012) Filesystem at /dev/mapper/system-srv is mounted on /srv; on-line ...
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3answers
174 views

Small office backups, small NAS (RAID) vs single disk

Assume a small office situation, 5-10 workstations (PCs), and a Windows server hosting a network share. The Windows server is in a 3+1 RAID 5. I am debating with myself over a backup solution and I ...
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3answers
486 views

IBM SR-BR10i RAID Controller too slow with VMware ESXi

I'm transferring a virtual machine from one ESXi host to another using SSH on both ESXi Servers. But it's painful slow, it's a massive 750GB .vmdk disk image, the VM is stopped (with downtime) and ...
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0answers
36 views

partitioning a 2x larger disk to house zfs migration

so there are numerous sites taking about using vdevs made from disk partitions like this in order to reorder vdevs of different sizes. however, i have the following physical disks: Disk /dev/sda: ...
20
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1answer
241 views

Is it possible that just one bit switches so my file shows me a letter “Q” instead of a “S”

In our application we use Hibernate and PostgreSQL to store data. In one of our database tables we have a discriminator column which says for example "TIPPSPIEL". It is a fixed string and can not be ...
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1answer
394 views

ATA errors on Debian 6 Xen host, but disks are fine

A Debian 6 machine with software RAID1 we manage (but don't have physical access to) is spewing out all kinds of errors about the disks (both ATA1 and ATA2). I have no idea what this could be. The ...
3
votes
1answer
443 views

iotop and iostat disagree

I'm trying to understand what's going on with my server's disks. It's running Ubuntu 12.04LTS and I'm used to using iostat to know when the disk is the bottleneck. But iostat -xd looks to me like ...
2
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1answer
55 views

Why the I/O rate difference between an LV and PV?

I have been doing some benchmarks reading with dd from both the LVM device and the PV device and I got some unexpected results: $ sync ; echo 3 > /proc/sys/vm/drop_caches; dd bs=1M count=1024 ...
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0answers
56 views

High Write I/O “Pulsing” with dtrace errors

We are experiencing "pulsing" writes to disk (from 1 writes out/sec pulsing up to 142+ writes out/sec) around every 10 seconds. See this example image: ...
3
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2answers
271 views

Confirm disk is broken when it passes all diagnostics

I have a system with a potentially broken disk, but the disk passes all manner of diagnostics. I have been unable to confirm that the disk is broken. What are my options? I could just replace the ...
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1answer
248 views

Does a 3ware “ECC-ERROR” matter on a JBOD when I have ZFS?

I have a FreeBSD 8.x machine running ZFS and with a 3ware 9690SA controller. The 3ware controller shows an ECC-ERROR with one of the disks: //host> /c0 show VPort Status Unit Size ...
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2answers
117 views

How can I detect hard drive failures? [closed]

I am in charge of a large number of Windows servers. Recently, many have been reporting hard drive errors with event codes 11 and 55. CHKDSK indicates that the drives are fine most of the time. What ...
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1answer
42 views

Monitoring Windows Hard Drives

When you run several 100 windows servers and even business systems, what is a good option for monitoring hard disks and checking for bad sectors? Are there applications out there that can send e-mail ...
0
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3answers
243 views

Dramatic disk I/O performance difference for two disks on same machine

A small machine (1 core, 1 GB RAM, CentOs 6.3) virtualized via Citrix Xen has 3 virtual disks with very different sizes. > cat /etc/fstab (snippet) ... /dev/mapper/vg_stagingnfs-lv_root / ext4 ...
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4answers
1k views

how to find a not formatted hard disk on linux

My server has 2 hard disks. One very limited of around 500 GB and another NOT FORMATTED of more than 1 TB. I need to find this second disk to format it (and eventually mount it to my Red Hat 6 ...
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1answer
573 views

How to change disk space quota on Plesk 11

I have recently migrated a few domains on a Plesk 9 server to a new Plesk 11 server. The old Plesk 9 server had just 5GB of disk space, so I put disk space quotas on the domains hosted on it. The ...
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2answers
235 views

How to repair a disk on Ubuntu when fsck fails?

I was able to start a broken raid 1 system with one available and one broken disk by issuing the following command. mdadm --assemble --force /dev/md9 /dev/sda1 /dev/sda2 I was able to copy the ...
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1answer
197 views

Will configuring a server with RAID 5 and (2*500gb) + (2*1TB) work?

I'm currently setting up a DELL server, which came with 2*500gb disk drives but is configured in RAID 1. I want to increase the total capacity of the disk storage to at least 1TB. Now with it being ...
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1answer
36 views

RAID1 Disk blocks don't match but no errors

So I have couple of disks configured with RAID1. The device is: md2 : active raid1 sda5[0] sdb3[1] 274324348 blocks super 1.1 [2/2] [UU] bitmap: 1/1 pages [64KB], 65536KB chunk Though when I ...
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1answer
138 views

Which directory hierarchy will be the best/fastest?

I have a pretty big directory with many cache files which I want to reorganise for max performance (access times). 2x 2TB SATA III drives, software RAID 1 (mirroring) OS: Ubuntu 12.04 LTS ...
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0answers
128 views

Resize a RAID 5 Partition

I'm moving my VG to a RAID, i have 3 disk 600GB, the VG is in the partition /dev/sdc2 /dev/sdc1 1G type linux <-- Boot partition /dev/sdc2 599G type Linux LVM One disk have the VG and with the ...
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3answers
1k 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 ...
4
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1answer
228 views

Data syncing behavior for filesystems in Windows

In Linux mounting supports commit option, which is described in mount(8) man page as: commit=nrsec Sync all data and metadata every nrsec seconds. The default value is 5 seconds. Zero ...
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1answer
88 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 ...
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2answers
413 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 ...
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0answers
55 views

Rebalance pooled disks

Using mhddfs multiple drives were pooled to form a big virtual mountpoint. Now using the mlimit option unbalancing is prevented, but the drives are already in an unbalanced state. Is there a script ...
0
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1answer
446 views

Resize/extend partition size CentOS

Im tasked to resize a partition on a remote server. I've read up on it and understand that i'll need unmount and use resize2fs /dev/sdato expand the partition size. Can someone please help me unmount ...
2
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1answer
250 views

How to deal with bad sectors?

Bad sectors will eventually occur, but how should I deal with them? If a bad sector occurs, does that mean that the data in that sector is irrecoverably lost, and I should restore it from backup? Is ...
-1
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1answer
133 views

Are disk partition labels or UUIDS stored in the partition area itself or in some other area of the hard disk? [duplicate]

Are disk partition labels or UUIDS stored in the partition area itself or in some other area of the hard disk? e.g If the dd command is used is used to copy the raw partition image from one partition ...
2
votes
1answer
107 views

Recover data after lvreduce on “/”

I accidentally ran lvreduce on / instead of "/home" on a RHEL 5.9 system that unfortunately had a lot of code that was not backed up, and the system will not boot now obviously. What is the best way ...
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2answers
7k views

How to get more I/O performance from Citrix XenServer?

I have a Citrix XenServer 6.1 installed on a HP Server (1x Intel Xeon E5630 @ 2.53GHz (4 cores, 8 threads, RAM: 752MB for dom0 and 55286MB for the guests). The server has 2 scsi mirrored disks and is ...
5
votes
2answers
982 views

HP 4TB SATA Midline in D2600 - what disk make is HP using & why WD RE4 don't work?

Does anyone know what make of disk HP are using in their 4TB SATA Midline & why WD RE4 don't work? So we use D2600 crates with HP 2TB disks, and just buy WD2003FYYS - pop them in old HP caddies. ...
0
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1answer
117 views

Huge disk write speed difference between two different servers

I have two servers, with similar disks. The first server has 4x300GB Seagate Cheetah 15K.5 model nº ST3300655SS 3.5'' RAID 10. The second 4x300GB Seagate Savvio 15K.3 model nº ST9300653SS 2.5'' RAID ...
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3answers
626 views

mkdir: cannot create directory `b': Disk quota exceeded

When i try to create a file or dir on my Ubuntu 12.04.2 LTS vserver i get a mkdir: cannot create directory b: Disk quota exceeded. But: Filesystem Size Used Avail Use% Mounted on /dev/simfs ...
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2answers
574 views

SSD read errors; should I be worried?

An SSD just over a month old is producing read errors in my syslog whenever rsync backs it up: [276877.360221] ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0 [276877.360226] ata1.00: ...
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2answers
191 views

Accessing the disk under Task Scheduler

I'm running a couple of console applications using task scheduler. These are applications that perform little backoffice tasks and run as C# console applications. The applications themselves run ...
2
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1answer
1k views

Why does a mysql query, that requires copying to tmp table, randomly sometimes consume 100% CPU during several seconds?

I have some crazy SQL queries in my PHP scripts which badly need some optimization. However the question is NOT about how to optimize them. These queries have a lot of "join"s and some bizarre "order ...
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1answer
96 views

Why disk manufacturers use 1000 instead of 1024 as base unit measure? [closed]

Today is considered normal to use powers of 1000 instead of 1024(SI x base2) on disks capacity(hd, ssh, usb...), even with our operating systems using base2 measures(except Snow Leopard). This makes ...
0
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1answer
140 views

ram disk mirroring part of physical disk

What I would like to do/have is: Some kind of application/driver that creates a RAM drive/partition that is actually assigned a drive letter (eg. D:). This drive letter should be based on/mirroring a ...
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0answers
267 views

Cannot initialize disk in PowerShell : Initialize-Disk throws “The disk has already been initialized”

I'm trying to change the flash drive's partition style to GPT using PowerShell, but the cmdlet throws "The disk has already been initialized" (even though I've cleaned the drive): PS ...
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2answers
201 views

Physical disks comprising a Volume in RHEL

How do I list the physical disks and associated information (disk model, size, etc.) for all disks that are members of a physical volume in RHEL? For example, if I do I "pvscan", I get the following ...
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1answer
66 views

3Ware 9500S - Do spare disks spin when not used

Does anybody knows if spare disks connected to a 3Ware 9500s controller will be spinning although not being used? This will wear unnecessarily the disk, possibly spinning for years before a unit gets ...
1
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1answer
142 views

Why can't I recover a RAID1 disk which apparently has no errors?

For several years now we run a software RAID1 on a old Gentoo box with a custom Linux 2.6.31. The RAID consists of 2 harddisk with 4 partitions each. In the last years it happend about 3-4 times that ...