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

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5
votes
2answers
16k views

How do you repair a damaged or corrupt partition? [on hold]

I have a user with an external hard drive that is no longer recognised: the drive letter does not appear in My Computer. The drive is a Western Digital My Book Essential Edition (WD2500C032) With ...
0
votes
1answer
802 views

Can't move large files, always get Input/output error after some time

I want to move a large file (hdd of a paralells vm, 81G) from one hd to another. After some time I get the error message: Input/output error. What can I do to move the file? I checked source and ...
0
votes
2answers
437 views

How is the average seek of disk estimated given a function to move head to n track

How is the average seek time of disk calculated if a function f(x) is given as an estimate of time to move head of disk to n tracks?
-4
votes
0answers
34 views

reboot a hard disk without rebooting a linux server? [on hold]

I don't even know if this is possible, but I have a test server - a mirror of my online server really - and I have some older hard drives in it. I also happen to be away from the system at the moment. ...
1
vote
3answers
83 views

How do I determine the number of changes made on a given hard disk?

In Windows how do I determine how many bytes have changed on a given Hard Disk??? I don't just mean how many files changed and the sizes of those changes. I mean given a period of time, say 1 hour, ...
3
votes
2answers
468 views

Which part of of a hard drive has the highest throughput, beginning or end of drive?

If I create a partition at the end of the drive does that create the partition on the outside of the platter where the data is passing under the drive heads fastest?
-2
votes
0answers
31 views

Is my hard drive beginning to fail? [on hold]

I wonder if my disk is failing. I can't even run self-tests on it. === DRIVE HEALTH INDICATORS === ID | NAME | TYPE | UPDATE | RAW VALUE | VALUE | ...
2
votes
2answers
2k views

High disk I/O activity in CentOS server

I have about 16 websites in a CentOS dedicated, and I am having some problems on high traffic hours, it seems to be a high disk I/O activity causing a general slowdown. I've installed atop and this ...
9
votes
5answers
80k views

Can you use a USB hard drive in ESXI?

I know that you can install ESXi 4.0 on a thumbdrive, but I was wondering if you could plug in an external harddrive to give extra storage to one of your VMs? We run a fileserver inside of ESXi that ...
0
votes
0answers
20 views

Dell PE 830 with updated BIOS - 2 TB HDD

I was wondering if anyone had overcome the small disk limit on this server? Mine does not have a RAID controller and I wanted to install (2) 2 TB drives in it for storage and use the Ubuntu 14.04 ...
1
vote
0answers
33 views

IBM X3850 M2 (7233) server hard drives - Novice help needed

We have just bought a used IBM X3850 M2 (7233) server. The plan being to use it for CFD analysis calculations, taking the workload off our workstations. Not being an expert on these matters... Can I ...
7
votes
4answers
7k views

dd on entire disk, but do not want empty portion

I have a disk, say /dev/sda. Here is fdisk -l: Disk /dev/sda: 64.0 GB, 64023257088 bytes 255 heads, 63 sectors/track, 7783 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size ...
1
vote
4answers
592 views

How to know which block device maps to which physical drive

I have a server with software RAID 1, two hot-swap sata disks. One hard drive started showing errors, I'm thinking about removing and replacing it, only problem is that I have no idea which of the two ...
0
votes
1answer
22 views

Server 2008 - Multiple Event 55 NTFS

VMware ESXi with a virtual server running Windows Server 2008 R2. Event Viewer Administrative Events logs are flooded with the following error: Event 55, Ntfs The file system structure on the disk ...
1
vote
3answers
348 views

Identifying failed hard drive in RAID

I have a server which is running customized version of Debian. It is attached a sun storage raid. It has very limited tools and installing new tools is not allowed. :( This message I see in dmesg: ...
4
votes
6answers
498 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 ...
6
votes
5answers
2k views

The difference between desktop-series HDD drives and server-series

What are the main differences between desktop-series hard disks and server-series? The obvious things I can see are: durability (server hardware mostly more qualitative and have more warranty) and ...
8
votes
7answers
11k views

Linux ATA errors: Translating to a device name?

When a Linux box gets an ATA error, it syslogs it with a message identifying the disk as "ata%d.00". How do I translate that to a device name (e.g. /dev/sdb)? I feel like this should be trivial, but I ...
0
votes
1answer
950 views

Where is my new hard disk Citrix Xen Center

I'm trying to create a new storage repository on a server that already has 2 old hard disks, set up with hardware RAID 1. It's my first time doing this in Xen Server environment so I wanna be extra ...
2
votes
4answers
336 views

Data Recovery Software (Formatted Hard Drive) [closed]

Well... I'd really appreciate your help on this one. It's like this: someone decided to reinstall Windows on his PC, but did not make any backups, and there are a lot of things (well... photos, ...
5
votes
1answer
269 views

Is it possible to calculate where is, physically, a bad block located on a hard disk?

I dd_rescue'd a hard drive, and I know where the bad blocks are. I still have the drive with me, so I can get any information needed from SMART or fdisk. I would like to know if it is possible to ...
-3
votes
3answers
541 views

Configuring RAID in HP Proliant ML350e Gen8 [duplicate]

We have purchased two stock HP ML350e Gen8 servers. Ubuntu 12.04 is to be installed in those. The stock, base unit have provision for 6 hard disks for creating RAID in which, one is filled with 500GB ...
1
vote
2answers
40 views

Create an MBR on secondary plex

I have a HP Proliant ML350 g6 server running windows 2008 std R2. This server had two hardware arrays in it. One array was a raid 0 with 1 physical drive running raid 0. The other array is 5 physical ...
11
votes
4answers
17k views

Would SSD drives benefit from a non-default allocation unit size?

The default allocation unit size recommended when formatting a drive in our current set-up is 4096 bytes. I understand the basics of the pros and cons of larger and smaller sizes (performance boost ...
2
votes
1answer
48 views

HP ProLiant Server HDDs - Buy Spare Parts vs. Retail

sometimes i have to upgrade HP Servers. For example when they get a new "job" to do. So lets say i need some more HDDs for an DL360 G7 Server. If the Server has an active HP Care Pack, does it matter ...
7
votes
6answers
3k views

What causes hard disk failures?

What causes hard disk failures in general. I would like to know the common causes and how to prevent such incidence.
2
votes
1answer
229 views

Is my hard disk failing?

I've just had the hard disk on my server replaced. It was part of a RAID 1 array. The sdb1 partition keeps failing every few hours now. # cat /proc/mdstat Personalities : [linear] [raid0] [raid1] ...
2
votes
6answers
12k views

How many times can you format a hard-drive?

I've read mixed cases all over the place regarding the life of a typical hard drive, and if reformatting degrades the disk. If so, could you measure the life of the disk in a practical manner or ...
0
votes
2answers
450 views

smartctl reports Current Pending Sectors as 2, but a long test doesn't find any errors

The SMART attributes on the drive are: SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH ...
2
votes
5answers
9k views

Replacing a dead hard drive in RAID 5 with a different type

One of the drives failed in my server configured with RAID 5, and I can't find a exact replacement. From my understanding, RAID 5 supports drives with different sizes. Is this safe? Any ...
0
votes
0answers
20 views

Server drives gives input/output error when formatting in Fedora

I am at a total loss as to why this is happening. I have tried everything I can think of. I am trying to format a drive in Fedora to use in the server. Every time I try to format it I get a ...
0
votes
2answers
937 views

How to diagnose failed drive on server with raid storage controller?

I have problem with one of my Dell PowerEdge R210. Machine is with Centos 6, today system logs started to inform that the hard drive is failing. Jan 6 03:20:12 centos6 kernel: LSI Debug log info ...
0
votes
0answers
77 views

Replacing failed drive on a ESXi host

I have a failing drive on my ESXi 4 host and I'm going to replace it. There is no fault tolerance (RAID), each drive on its own. I'm planning do offline dding old drive to new one but I'm not sure ...
5
votes
3answers
8k 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 ...
0
votes
2answers
341 views

Install Winsat on server 2012? Windows System Assesment Tool

I use winsat disk to see my disk read / write speed windows 8 and it works great: cmd : winsat disk -drive c Can this be used on windows server 2012?
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 ...
0
votes
1answer
56 views

Windows Software RAID with Bad Sector: Which drive is broken?

We have three Seagate drives in a Windows software RAID stripe arrangement. The server began to freeze up. I was running two backups simultaneously with Acronis and BackupChain and thought I ...
1
vote
3answers
64 views

distributing tables over multiple harddrives

Is there a performance improvement when I distribute database tables over different harddrives? I need to access many different schemas at the same time and I was wondering if adding more harddrives ...
0
votes
0answers
34 views

Additional hard drive not detected in BIOS

So I'm working on a server which has a Tyan S2937 motherboard, and 2 CPUs. I have a drive bay capable of supporting 6 drives, and the motherboard has 6 SATA connectors. I want to setup the system ...
21
votes
14answers
22k views

Fastest, surest way to erase a hard drive?

I'm looking for a quick, simple, and effective way to erase the hard drives of computers that my company will be getting rid of (donation to charity, most likely). Ideally, I would like a ...
8
votes
1answer
965 views

Recover data from SCSI hard disk

We've got an old server with SCSI hard disk. The server crashed last week and it isn't exactly known what hardware component is damaged. Since the server is due to be retired anyway we don't want to ...
0
votes
0answers
48 views

mdadm: can't remove broken drive from raid1

I have a ubuntu server Ubuntu 12.04.5 LTS (GNU/Linux 3.2.0-34-generic x86_64) that uses a software raid with 2 physical drives. Apparently, one drive is unresponsive, and I try to remove it from ...
0
votes
1answer
43 views

Max Size of Disks Supported by Controller

I am interested in purchasing (second hand) a Dell Poweredge 2950 2nd Gen server. However, the specs say it has a max storage size of 4.5tb. I am wondering if this means just what is available to ...
10
votes
2answers
8k views

High disk I/O - jbd2/sda2-8 process

I have run a file server on a CentOS 5.8 final server. My only concern at the moment is what appears to be intermittent but continuous high disk I/O activity causing a general slowdown because of ...
2
votes
1answer
113 views

Why can't a GPT partitioned disk on SATA be read on USB?

If I GPT partition a 4TB disk when it is connected to SATA, then it works fine. If I take the disk and put in the an USB3 enclosure, then I get [root@localhost liveuser]# sfdisk /dev/sdb sfdisk: ...
4
votes
3answers
1k views

Convert full hard drive to LVM without external storage

Recently, my 2TB hard drive ran out of space, so I purchased another one to supplement it. My old drive is mounted in a specific folder (does not have system files or anything). Technically, I could ...
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 ...
14
votes
2answers
11k views

How to determine the best byte size for the dd command

I know that doing a dd if=/dev/hda of=/dev/hdb does a deep hard drive copy. I've heard that people have been able to speed up the process by increasing the number of bytes that are read and written at ...
0
votes
0answers
22 views

Hard Drive Recovery; Owned by 1001 and operations block

I'm trying to recover data from a crashed hard drive. I have a SATA to USB cable and I'm trying to pull the data onto a temporary machine. The drive mounts just fine. However, the drive is owned by ...
0
votes
0answers
23 views

IBM XSeries 346 Ultra 320 hdd upgrade options

I recently acquired a IBM XSeries 364 server that I purchased to play around with(still in school), I figured at worst I can use it as a file server or TFS box. Now I realize that this machine was ...