Questions about hard disks' performance, issues, tips, and software.

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3
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8answers
4k views

md5sum repeatedly gives different checksum for same file on same machine

I have a very small and quite old hard drive disk, about 32G. On to this disk I have copied a largish tar file, about 5G. When I run md5sum to generate a checksum on this file I repeatedly get ...
3
votes
2answers
225 views

CentOS expanding directory

I currently have a file server, and all the files are installed in /usr/local/nginx/html/. The setup is one hard disk with 1 TB of data. This 1 TB of storage is all used up. I asked the ...
3
votes
2answers
201 views

Age replacement policy for hard disks and SSDs at servers

I'm planing an age replacement policy for our storage and servers. Most of them are for DBs and some for images (static content) so yes, they have an huge I/O everytime. Also, we use Samsung 840 Pro ...
3
votes
3answers
2k views

Is this hard disk dead?

Not sure, is this right site for this Q, but let me try Last time i have problem with hard disk. Sometimes its do strange sound, and i get it from logs: $dmesg | grep ata4 [29409.945516] ata4.00: ...
3
votes
5answers
649 views

If you don't need to cram more disks in the same space, do 2.5“ hdd have any advantage over 3.5”?

Nowadays many server systems use 2.5" hard disks, afaik because they can put more spindles in the same chassis and maybe they use less power. When I don't need / cannot put more disks, is there any ...
3
votes
7answers
291 views

Secure Formatting Disks

I heard about people that used tools to recover deleted data and found a lot of unusual data, that after discovered that the their brand new pc in truth was used... When discarding HD's, as sysadmin, ...
3
votes
6answers
11k views

What is the recommended temperature range for a hard drive?

What is the best temp to keep harddrives running in? I have harddrives that keep failing due to the temp being to high.
3
votes
5answers
4k views

SATA Drive Replacement on Dell PowerEdge R410

I just talked to our Dell rep about purchasing some PowerEdge R410s and R510s and he made a comment that the SATA drives are 'special' and can't be replaced by aftermarket drives because of some ...
3
votes
5answers
2k views

c:\windows\installer Folder

On 1 of our main servers running Windows Server 2003 some bright spark decided to only partition c:\ with 20GB on a 250GB Harddrive. Problem I have is c:\windows\installer folers id taking up 13GB. ...
3
votes
3answers
531 views

Diffing two filesystems

Is there any sensible way to diff two filesystems? On occassion, you have a box that is working, and, say, perform an update and it no longer works. You have dozens of other machines that are ...
3
votes
2answers
533 views

ext4 fs breaking after power outages

I am experiencing quite a typical but strange problem: the hdd is going bust after power cuts on my server. I can feel it huge work done by fsck on startup after the crash, and then my subversion ...
3
votes
5answers
495 views

Solid State Hard Drive

It's said that Solid State Drive is much better than SATA one as there is no spinning head or os. So, there won't be hard disk crash problem?
3
votes
2answers
1k views

Windows Server 2008 Disk Size

I have a fairly fresh install of Windows Server 2008. When I right click on the C: drive and view properties, it says I have used 25.2 GB, but when I select all the contents of the C: drive and view ...
3
votes
3answers
3k views

How to stop a linux server from beeping when a RAID HDD has failed

A HDD has just failed on a linux server (Red Hat Linux release 9) we support. Not a big problem since it's on a RAID (MegaRAID SCSI). We're now in the process of getting a new one to replace it. In ...
3
votes
2answers
562 views

SATA 7.2K HD Suitable for File Server

Just discussing a new Server with a client and they are insisting on using two 3Tb 7.2K SATA Driver in RAID 1. I wanted to get them 5 15K SAS Drives in RAID 5. Can anyone tell me what the true speed ...
3
votes
3answers
279 views

HP SAS hdd in non-HP server

I wonder if I could re-use some HP SAS drive in a non-HP server. Description: 146GB 2.5" Serial Attached SCSI (SAS) SFF 3G Single Port Hot-Plug 10K HDD Option Part# 431958-B21 Spare Part# 432320-001 ...
3
votes
6answers
2k views

using dd command to get hard drive image

Is there a way to use 'dd' command to get a hard drive image that ignores the free space on the hard drive?
3
votes
1answer
4k views

Hyper-V - Creating a large fixed disk - EXTREMELY Slow

Hey everyone, after posting another question here, it seems I have to create a fixed disk in order to get one 700GB. I have shut down the machine (which basically has nothing on it), and gone to ...
3
votes
3answers
1k views

Large disk queue length

A few days ago disk on my server started to have large queue length: I've changed controller battary recently, HP configuration utility was saying the battery is bad, but after changing the battery ...
3
votes
5answers
1k views

Server with 3 Disk, what's the best HD Configuration?

I Have an HP Server with a quad core Opteron and 3 Disk 250Gb S-ATA Disk, i'm thinking about what's the best configuration of the disk for performance and reliability. There is mainly 2 scenario : ...
3
votes
2answers
6k views

Predictive failure on hot swappable drive

on a HP PROLIANT ML350 G5 server, one of 3 physical hot swappable drives in a Smart Array has a status of Predictive Failure and the amber light is flashing. Each drive is 146GB. In HP System ...
3
votes
3answers
1k views

Why does a RAID-0 volume randomly fail with healthy drives?

I have had a pair of 5 year warranty WD Velociraptors hardware stripped on an intel ICH8R motherboard controller for about 1.5 years. The other day, the volume randomly failed during no specific ...
3
votes
3answers
243 views

Is there still a reliability problem with >250GB drives versus < 250GB drives?

Are there still reliability problems with high capacity magnetic disk drives? When 500GB and 1TB drives first appeared on the market, they had significantly lower reliability than their smaller ...
3
votes
1answer
339 views

Using consumer grade hard drives in a server

My company needs to upgrade a couple of (very) old servers we are currently running, but we are kinda strapped for cash. We got a great offer on a pair of HP DL360 G6 servers, but the hard drive cost ...
3
votes
1answer
190 views

Consumer HDDs in a HP ProLiant DL180 G6?

Model: HP ProLiant DL180 507168-B21 Will a ProLiant DL180 G6 work with a single 1TB consumer hard drive in a caddy? Yes, I know I should use enterprise HDDs but we have a limited budget, and this ...
3
votes
2answers
5k views

Can I increase my Dell RAID 1 from 250GB to 500GB just by plugging in larger drives?

I have a Dell PowerEdge R300 with a Dell SAS 6/iR Internal Controller RAID PCIe and two 250GB SATA HDDs in RAID1 configuration. One of the HDDs has died so I want to swap it out for another. At the ...
3
votes
2answers
1k views

Move /var to new set of disks

I currently only have remote access to this CentOS box, I need to move /var form the primary RAID to a new set of disks that was installed with more space, My current thoughts on how to accomplish ...
3
votes
3answers
7k views

How to repair the fstab file with current configuration

I'm using Ubuntu 10.04 and i accidently removed all the entries from the fstab files while doing a backup (Yeah, I know ;)). I would like to know if there is a way to rebuild it with the current ...
3
votes
3answers
3k views

Windows 2008 RAID Failed Redudancy - which is the “current” disk?

I have a Windows 2008 Server with a two-drive software RAID 1 (mirroring). Last night one of the drives apparently failed (just disappeared from the system) and I had to boot from the secondary plex ...
3
votes
2answers
1k views

Poor performance from SAS disks on HS22 blade in CentOS/RHEL on ESXi 4.0

I have an HS22 blade configured with two 600GB 10K 6Gbps SAS drives configured in RAID1 using the onboard LSI Logic controller. Running on it is VMWare ESXi 4.0u2, and on top of that are a couple VMs. ...
3
votes
3answers
6k views

Add SATA HDDs to Dell PowerEdge 2950 (PERC6i) - Do HDD brands matter?

I'd like to add a couple SATA drives (1TB+ each) as RAID 10 to my PE 2950. Dell's website lists some 1TB drives that are quite expensive. Are there any advantages of using those over a HDD purchased ...
3
votes
4answers
779 views

0x00000077 Error on the corporate server

OKay so I have a slight problem that might either be apocalyptic or benign, but I don't know which. Context, updated: The server is in a small unventilated unlocked room that is about two feet wide ...
3
votes
3answers
35k views

Best way to partition 1TB drive for windows7?

Linux admins usually split their hard-drives into partitions for /usr space, os space and whole other kinds of swapness. I know windows7 requires 20GB at least for the OS to be installed. What is the ...
3
votes
3answers
150 views

Will adding HD's to a Proliant 350e server invalidate the warranty

We are looking at getting a new file server in the office. When looking at HD's the ones that HP sell are twice or more than just buying a drive and getting a caddy to hold it in the server. When we ...
3
votes
2answers
2k views

DegradedArray event on /dev/md1

This morning I got this message: This is an automatically generated mail message from mdadm running on A DegradedArray event had been detected on md device /dev/md1. Faithfully yours, etc. P.S. ...
3
votes
1answer
3k views

Why does storage's performance change at various queue depths?

I'm in the market for a storage upgrade for our servers. I'm looking at benchmarks of various PCIe SSD devices and in comparisons I see that IOPS change at various queue depths. How can that be and ...
3
votes
1answer
228 views

How can i handle huge log files?

I am running SSD servers because I have great experiences with performance. However I have webservers which serve lots of requests and the uncompresssed logfiles of one day tend to grow out the ...
3
votes
1answer
266 views

“Transparent” SATA RAID Controllers [closed]

I'm looking for a true hardware SATA RAID controller that can do levels 0, 1, and 5 and is, for a lack of a better term, "transparent" to the OS in that it requires no software drivers whatsoever. ...
3
votes
3answers
803 views

Ubuntu Device-mapper seems to be invincible!

I'm working on a hopefully unrelated question question and I've got to a strange situation. First: I know very little about the very low level hardware kernel storage driver magix, so I'm hoping a) ...
3
votes
4answers
3k views

Why can I not shrink the disk volume down more than 50% of original size on Server 2008

I have a new server with 540 GB disk on one partition. I decided to shrink the volume down so I could have a couple of partitions for various reasons. I could only shrink the volume by 50%. I went ...
3
votes
2answers
1k views

How do I get hard disks to spin down?

I am going to build a server for backups. I want to install the operating system on USB flash disk (a little space), and attach some hard disks for data (much more space needed). Because it is going ...
3
votes
1answer
3k views

Is this a sign of dying hard drive?

Today I wasn't able to access one of my hard drives, after reboot it seems to work now, but i'm worried it's going to die soon. /var/log/messages Jul 4 17:05:02 host-37 kernel: [401496.020869] ...
3
votes
3answers
5k views

Forcing a verbose fsck on reboot (Ubuntu)

I'd like to force a verbose fsck on reboot of my Ubuntu linux server, I can get fsck to run on reboot by creating a file /forcefsck in my root dir ... Additionally, by adding a y into the contents of ...
3
votes
1answer
3k views

Mounting an old LVM hard drive in Fedora 17 gives error message

On Fedora 17, I am trying to mount a hard drive as slave using the following command: mount /dev/sda5 /mnt/fedora8 And I get this error: mount: unknown filesystem type 'LVM2_member' How do I ...
3
votes
2answers
149 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
712 views

Can't get any SMART or temperature data from HDDs

I have a PC with recently installed Gigabyte GA-X79-UD5 MB. I've encountered some weird problem with getting SMART data or temperature for HDDs. Every single tool I've tried in Windows 7 just can't ...
3
votes
4answers
7k views

Dell PowerEdge 2800 Logical Disk Failure: Any Possible Recovery?

I was noticing a issues with the server. Usually Microsoft Updates that have downloaded, but are waiting to be installed can cause this. Before applying the updates and restarting, I ran several ...
3
votes
4answers
1k views

Can I use 2x 1TB 64MB Cache and 1x 1TB 32MB Cache in a RAID 5 setup?

I've been told the drives have to be identical for RAID 1, but when searching for additional drives in local stores to match: WD 1TB Caviar Black 7200rpm SATAII w/ 32MB Cache They say they don't ...
3
votes
1answer
603 views

Properly copy partition data to another disk?

I have a disk with separate partitions for each folder (/usr, /var, /home etc.) and wish to transfer the whole thing to another disk that is slightly larger, now I do not wish to keep the partition ...
3
votes
1answer
1k views

smartctl to find how old is the hard drive

I just got a new server from a server provider and he placed in some old 1.5TB HDD. They do support smartctl. Is there a way I can findout how old these drives are?