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

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5
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1answer
190 views

HDD is acting up, but S.M.A.R.T says everything is fine

Before I begin, a quick disclaimer. I'm basically a developer forced into a sysadmin role by circumstances, so I apologize in advance if I say something stupid or seem like I don't know what I'm ...
5
votes
1answer
205 views

26 hard drive limit on x86 servers, IBM x3650, Dell PE 2950, Dell PE 2850, where is my limitation?

This is in regard to mass HDD wiping/testing. The software I use, WipeDrive Pro 5 and 7, both fall victim. I originally thought it was a limitation of the software, but after speaking with the ...
5
votes
1answer
3k views

Does Dell Permit 3rd Party Hard Drives on Perc 6/i?

I have various Dell servers (all 2950's) I would like to put some SSDs in. I have spoken to Dell on the phone and asked for a quote for 128GB SSDs for 2950's, they told me they don't sell them for ...
5
votes
2answers
3k views

How to determine which file/inode occupies a given sector

I received messages in /var/log/kern.log that indicate drive failure. The messages occured while copying my $HOME between drives (ext4 -> ext3): [ 5733.186033] sd 4:0:0:0: [sdb] Unhandled sense code ...
5
votes
2answers
109 views

Is it true that is better to differentiate manufacturers when buying Hard drives for a server?

This morning, listening to Stack Overflow podcast #35 *, talking about Server, RAID controllers and Hard Drives, I heard this thing: if you are going to buy Hard drives for your server, you would ...
5
votes
3answers
9k views

hdparm on OS X

On Linux, I can verify and change the low level parameters of my disk drive using hdparm. Is there an utility providing the same capabilities for OS X, or perhaps some other way of manipulating the ...
5
votes
1answer
1k views

Is there way to read sectors from SATA drive without ECC correction?

I know, there was such possibility like that in old ATA standards: "READ LONG" command produced LBA sector + ECC payload. sg_read_long supports in in linux, but the command is obsolete for quite a ...
5
votes
5answers
3k views

Which hard drive corresponds to ata1.00 and ata12.00?

I have an Ubuntu installation which has a lot of hard drives. Two of these drives have hiccups and SMART is reporting errors. However, I cannot figure out how to determine which drive is ata1.00 and ...
5
votes
3answers
266 views

Can a VM's virtual disk span over multiple nodes in Ubuntu Enterprise Cloud?

How does storage works with the ubuntu enterprise cloud? If I have two disks (on separate machines) with free space 10gb and 20gb, can I have a VM running with 30gb of disk space?
5
votes
6answers
26k views

Check for hard disk errors / signs of failure on CentOS Server

What's the best way to check for HDD errors and early signs of failure on CentOS?
5
votes
3answers
1k views

How do I calculate the disk subsystem i/o capacity

I am trying to figure out the number of 8K page i/o capacity for a disk subsystem. The drives are SATA 7200 RPM - 4 drives in a RAID-5 configuration. I am not sure about the SCSI controller but the ...
5
votes
1answer
4k views

Change owner of LVM LV's device node in RHEL5

First time using serverfault, please excuse any breaches of etiquette. I've created several LVM2 logical volumes in local storage on a server, and would like one of the device nodes - not the ...
5
votes
2answers
3k 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 ...
5
votes
2answers
2k views

e2fsck extremely slow, although enough memory exists

I've got this external USB-Disk: kaefert@blechmobil:~$ lsusb -s 2:3 Bus 002 Device 003: ID 0bc2:3320 Seagate RSS LLC As can be seen in this dmesg output, there is some problem that prevents that ...
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 ...
5
votes
2answers
1k 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. ...
5
votes
5answers
2k views

What options are available to perform whole disk encryption with Snow Leopard

We would like to encrypt the entire disk of a Snow Leopard workstation running some sensitive file, database and web services. PGP does not yet work for 10.6, and we cannot use FileVault as it is not ...
4
votes
15answers
3k views

What are some free utilities for securely wiping data from a floppy disk?

I have a stack of old floppy disks in my server room and before disposing or donating them, I want to make sure they are cleaned. Can anyone suggest some free utilities (Windows or Linux) for securely ...
4
votes
7answers
1k views

Tips and tricks for identifying the dying hard drive

I have a raid 1 that has failed partially. The controller tells me the raid is degraded, but does not tell me which drive is failing. When I look in My Computer, I see that the controller split my ...
4
votes
5answers
36k views

Mount network drive as physical drive

Is there a way to mount a network location so that it appears as a local physical disk? e.g. \\computer\share as D: (not a network drive) Edit: Hey guys, does anyone have a solution to this?
4
votes
12answers
19k views

SQL Server database on an external hard disk drive

Due to some security problems, My boss has asked me to store all sensitive data in external/removable storages like USB stick or external HDD and this specially includes the MDF/NDF/LDF files of SQL ...
4
votes
7answers
720 views

Inexpensive degaussers or HDD shredders?

Apologies, I'll simplify my question: Are there any degaussers or HDD shredders out there in the $500-1500 range designed for use as such that you would recommend for low-volume use?
4
votes
6answers
643 views

What are the the potential drawbacks of using non-OEM hard drives in a server?

I'm currently speccing a Hyper-V host for my company and would like to use solid state drives for local storage. The problem is, most oem drives have a hefty premium when compared to retail ...
4
votes
3answers
2k views

Why do servers have SAS instead of SSDs? [closed]

I was wondering why do servers still come with SAS disks instead of SSD disks? I know that SAS are faster than normal hard drives but they are still much slower than SSDs. I think they are more ...
4
votes
2answers
807 views

Web site kills hard disk I/O, how to prevent?

The situation: I have a server, on which we have 2-3 projects. Starting not long ago, the server started hanging up (We could not connect to it by ssh, and the connected clients had to wait 20 minutes ...
4
votes
6answers
23k views

How can I convert a logical partition to a primary partition?

I had my primary partitions maxed out but I deleted some and now I want to make one of my logical partitions a primary. Can I do this with gparted or other free tools? Thanks
4
votes
3answers
666 views

RAID - buy spare disks at same time as originals?

When using RAID1, is it best practice to buy spare disks at the same time as the original disks to ensure you have the identical type in case they become unavailable in future?
4
votes
6answers
1k views

Securing a single HDD from a retired RAID 5 array

I want to sell two hard drives. Both have been used in a software RAID5 with a logical volume manager. I want to delete all data in order to sell them. But on the devices are no partitions. Is it ...
4
votes
5answers
822 views

Hard drive throttling?

You're copying a lot of stuff in same time and computer performance just dies. Try for example to copy 10+ ISO images same time. There's QoS in networking, affinities and priorities in CPUs, but is ...
4
votes
4answers
258 views

Is it safe to mark a disk ok, in a degraded raid 5 array?

Intel Matrix Storage Console 8.9 showed a degraded array with one disk failure. Yet it offers the option to mark the disk as ok and rebuild the array? When would it be appropriate to do this? Does it ...
4
votes
4answers
332 views

What is the best hard drive for random-reading small blocks

We need to do random reads (seeks) on 5 KB blocks from a huge file (150 gigabyte). What hard drive is the best suited for this type? What is the expected performance from an SSD in this scenario? I ...
4
votes
8answers
938 views

Getting data out of a non-working SATA drive

Can anything be done to get data out of a dead SATA drive, the drive won't even show up on the list of drives when booting the computer? UPDATE: The drive was never backed-up. It was an external ...
4
votes
4answers
3k views

Is it normal for a SAS drive to have a few bad blocks, or should I replace my drive ASAP?

I have a drive—part of a RAID 1 mirror—that has two bad blocks. Adaptec Storage Manger e-mailed me when it detected the blocks. It shows 4 medium errors for that drive, but state is still “optimal”. ...
4
votes
6answers
462 views

Is there a Linux utility that can distribute files to an array of hard disks, like a load balancer, but for storage?

I have 2 1TB disks not in any RAID configuration. I'd like files I need to store to be placed on one of the disks depending on the capacity of the disks, and when accessing the file I suppose I'd need ...
4
votes
6answers
12k 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.
4
votes
4answers
413 views

I have a 3.46 TB Raid disk array, but when I setup windows server 2012, it only refers to it as 2TB

I have a 3.46 tb raid disk array, but in volumes it shows it only as 2.00TB What have I done wrong, and how can I fix it? Thanks Noam
4
votes
3answers
1k views

mdadm RAID 5 Failed with 2 Drives while rebuilding

I have a RAID 5 array with 3 Disks (sdb sdc sdd) Over last weekend I was prompted that sdd had failed. so replaced the drive, added it back into the array and let it rebuild (1.5TB) It stopped at ...
4
votes
4answers
4k 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.
4
votes
4answers
804 views

Disk full on linux server, blocks used is much less then blocks avalable

Output of df is: [root@backup log]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/VolGro 1889811408 1861658948 0 100% / /dev/sda1 101086 ...
4
votes
6answers
8k views

Does this SMART selftest indicate a failing drive?

I'm wondering if the results of this SMART selftest indicate a failing drive, this is the only drive that comes up with 'completed: read failure' in the results. # smartctl -l selftest /dev/sde ...
4
votes
5answers
500 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?
4
votes
5answers
8k views

Extend Raid5 with a new HD (HP DL380 G3)

Because one of our customers is running out of disk space, I need to extend his Raid5 with one more disk. At the moment the raid5 contains 3x72gb harddisk. The harddisk i want to add is exactly the ...
4
votes
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!
4
votes
5answers
859 views

How do data recovery firms recover data from a “dead” hard disk?

The hard drive in my laptop just died, and it's been about a week since I ran a full backup. I know there are companies that specialize in data recovery from dead hard disks. I'm curious how they do ...
4
votes
3answers
4k 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 ...
4
votes
3answers
2k views

Web-based disk space visualizer

I have a number of Linux webservers for which I'd like to track where disk space is going and keep disk space to a minimum. Typically I login on SSH and use du to find out where disk space is wasted ...
4
votes
2answers
508 views

choosing the right RAID level for PostgresQL database

I got an disk array appliance of 8 disks 1T each (UltraStor RS8IP4). It will be used solely by PostgresQL database and I am trying to choose the best RAID level for it. The most priority is for read ...
4
votes
4answers
469 views

Can any hard drive of the same format be put into a hot-swap tray?

I'm looking at buying a hot-swap NAS that supports SATA/SATA II hard drives. Can I get any SATA drive and put it into the hot-swap trays it comes with, or will I need to find a certain kind of drive? ...
4
votes
4answers
3k views

How reliable is HDD SMART data?

Based on SMART data, you can judge the health of a disk, at least that is the idea. If I, for instance, run sudo smartctl -H /dev/sda on my ArchLinux laptop, it says that the hard drive passed the ...
4
votes
2answers
8k views

kvm low io performance

performance of my setup is quite good (geekbench, how it 'feels', ...) even disc throughput (libvirt on raw lvm-partition) is very close to the raw performance on the server) but IOP/s are as low as ...