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

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1
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3answers
69 views

/dev/sdc1: unable to read superblock

Linux Ubuntu 14.04 (azure server) I was trying to backup /dev/sda1 drive so I executed the sudo dd if=/dev/sda1 of=/dev/sdc1 command. While executing the command is available, the space was ...
26
votes
8answers
16k views

Is bit rot on hard drives a real problem? What can be done about it?

A friend is talking with me about the problem of bit rot - bits on drives randomly flipping, corrupting data. Incredibly rare, but with enough time it could be a problem, and it's impossible to detect....
4
votes
2answers
134 views

ZFS checksum errors, when do I replace the drive?

I'm fairly new to ZFS and I have a simple mirrored storage pool setup with 8 drives. After a few weeks of running, one drive seemed to generate a lot of errors, so I replaced it. A few more weeks go ...
-2
votes
1answer
1k views

How many hours of SMART power on hours use should a new hard drive have?

Purchased a new HGST hard drive. Using smartctl on OS X the new drive shows 71 hours of power on hours Does this make sense or is this a sign of a refurbished drive? I can't imagine why the ...
0
votes
1answer
4k views

FreeNAS not detecting hard drive

I have a FreeNAS box (OS install onto USB), with 2 hard drives in it. In the GUI its only showing 1 (ada0). How do I make it detect the other one? They are both showing in dmesg: ada0 at ahcich1 ...
1
vote
1answer
1k 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 ...
8
votes
2answers
3k views

How do you disable the “last accessed” attribute on NTFS/Windows?

Inspired by this answer, I realize I have no idea how to disable the last accessed attribute in Windows to increase performance. If you can, how? I know in Linux you can mount the partition with the '...
0
votes
1answer
2k 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 ...
2
votes
1answer
2k views

Linux - KVM - very slow disk io

The I/O performance of my new server is pretty low. I Googled and tried everything I can imagine. First of all, here are the Hardware Components: AMD Opteron(tm) Processor 6344 4x Seagate ...
0
votes
2answers
1k views

Accessing data on SAS drives if server fails

If my server goes down, how can i access the data on the SAS drives? I don't have another server to plug them into, and even then connecting the drive to a different controller (while keeping the ...
2
votes
1answer
51 views

btrfs increase raid capacity by replacing disks (and not adding disks!)

I'm very excited about the new features of btrfs and would like to start tesing it. Before I get started, I would like to ask if btrfs supports increasing raid capacity by replacing disks by bigger ...
1
vote
1answer
1k views

Acknowledging a warning in DELL OpenManage

We have a DELL R510 server where we replaced all the hard drives with new but non-certified 3TB disks. Now OpenManage throws a warning for every hard disk as "non-critical", since it recognizes the ...
0
votes
1answer
17 views

Seagate Wireless Pro access via File Explorer on Windows

I bought a Seagate Wireless Pro Harddrive and I'm unable to access the network share on some devices but I can access their UI through the browser on all devices. I used this as a guide initially. I'...
-1
votes
0answers
16 views

fio results of performance measurements (esxi+RAID10) better under Windows than Linux

Summing up On same hardware: fio, Debian 8 on bare metal: read : bw=11973KB/s, iops=1485, clat 99.00th=[ 758] fio, Windows 2008 R2 in ESXi 5.5u2 VM: read : bw=43277KB/s, iops=5398, clat 99.00th=[ ...
3
votes
6answers
14k views

How can I accurately determine the age of a hard drive?

Yes, if it's large, heavy, and only 65 Meg in capacity, you can assume it's ancient. An RLL controller would positively indicate the drive is from antiquity. What about drives that are only 3 or 4 ...
1
vote
1answer
30 views

Replacing all drives on an existing RAID 1 + RAID 5 setup - all at once or one at a time?

I'm looking at upgrading hard drives in a PowerEdge R720 and need a little guidance. Current configuration: OS: CentOS 6.5 Drives: 2 x 300gb drives (RAID 1) 4 x 600gb drives (RAID 5) I have 6 ...
-2
votes
0answers
9 views

Hard Drive not booting windows 7 installation disc. PC whipe gone wrong [closed]

http://paste.ubuntu.com/20270076/ Boot-repair-disc doesn't have the "Recommended repair" option. The only option was "BootInfo summary (to get help by email or forum)". After clicking that option it ...
-1
votes
0answers
15 views

Best way to storing images on linux server [closed]

I am working on a project where i have to store 100's of gb of images on server. currently i bought a dedicated server with 50 GB and i ran out of space in one week as i am storing allot of images. ...
0
votes
1answer
18 views

Dell E7470 Imaging in Windows PE and Acronis

Our India office has received a shipment of Dell Latitude E7470 laptops. Our technician there is having issues imaging this laptop when attempting to use Acronis True Image (2015) as well in Win PE (...
0
votes
1answer
15 views

Using a surveillance drive in a Web Server

Would there be any concerns about using a Surveillance/DVR, Advanced Format drive in a Linux Web Server. Only wondering because I have 2x 1TB Seagate Video drives here that are now collecting dust ...
0
votes
0answers
7 views

Detect failing USB hard drive automatically [migrated]

I Have a Raspberry Pi which has one USB external hard drive attached to it (via a separatly powered USB hub). The thing is that sometimes this disk becomes unresponsive (I can't access its mounted ...
-3
votes
1answer
28 views

Has my RAID drive failed?

I checked the output of my server today and it said: root@s01 [~]# mdadm --detail /dev/md1 /dev/md1: Version : 1.1 Creation Time : Sat Jul 7 18:23:24 2012 Raid Level : raid1 ...
1
vote
1answer
1k 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 ...
0
votes
1answer
558 views

External HDD wrong size

I have an very interesting problem with a Seagate HDD (3TB): Under Windows the HDD has a size of ~3TB. When I connect it to Ubuntu 14.04 and try to format it with GParted, GParted tells me that the ...
0
votes
2answers
2k 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. ...
2
votes
1answer
68 views

Can I swap out caddie tray to use hard drive with another server?

Supporting legacy (Sun Fire X4100) equipment, looking to purchase drives of higher capacity and/or get better pricing by not limiting my selection to former-Sun hard drives. I've been told that ...
-2
votes
0answers
16 views

How to clone a partition of LUKS disk?

I have cloned a LUKS drive whose volume is 16012804096 bytes ( on a kingstone sd card). I want to recover it to another SD card ( another sandisk SD card ). But the volume of sandisk card is ...
0
votes
0answers
6 views

TestDisk doesn't write partition table [migrated]

I'm using TestDisk to try recover a disk with a single ext4 partition which I can see with TestDisk, but can't write (the partition table). I can browse files from TestDisk, but after writting I have ...
14
votes
5answers
30k 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 (...
19
votes
3answers
6k views

RAID-6: better to replace two dead drives at the same time, or one at a time?

We have a 16-drive RAID-6 that has three problem drives. Two are already dead, and the third is giving SMART warnings. (Nevermind how it got in such a bad state.) Obviously we want to replace the ...
14
votes
9answers
19k views

Physically Identify the failed hard drive

So, let's say your server had 6 healthy hard drives. A drive fails (will not mount/detect, drops out of raid with errors) or is failing (SMART getting worse, etc). You need to swap out the bad drive....
2
votes
2answers
257 views

Savvio disk in HP ML350 G5 server

Has anyone got real-life experience with using a Seagate Savvio disk in a HP ML350 G5 server. There are two things I'm worried about. Will it physically fit the tray, can the tray be inserted and ...
1
vote
3answers
3k 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 ...
0
votes
0answers
40 views

hdparm unlock ssd with correct password encoding

I have an old password protected SSD connected via USB to my Linux System. I'm trying to unlock it with hdparm. Problem is my password was ./perspective (it doesn't matter now because I only used it ...
0
votes
1answer
21 views

How to set up LVM in this situation?

http://prntscr.com/bhyu4k I have a set up that looks like this, and I need to have sda3 and sdb under /home folder, all as one. I dont care about the contents of the current /home directory, ...
0
votes
1answer
48 views

How to combine an sdb disk with /home directory on sdb1?

I have two physical hard drives and the set up looks like this: http://prntscr.com/bhyu4k I need to partition the sdb1 (fdisk), create ext4 filesystem based on the type that is used on sda (mkfs ...
0
votes
1answer
17 views

ChkDsk Timout during repair attempt

I started chkdsk H: /F /R /X as admin on a SATA harddisk (WD Caviar Green 1TB) that I mounted using an USB adapter. After a while the operation timed out with the message The specified I/O on \...
0
votes
2answers
85 views

Does the backplane on an HP server have any impact on the speed of the drives?

I have an HP Proliant DL380 Gen7. The server currently has no drives and is running on the integrated smart array controller. I was looking into replacing the controller with an LSI-9211-8i controller ...
10
votes
4answers
20k views

Differences between /dev/sda and /dev/sda1

I know that /dev/sda is the raw device, and that /dev/sda1 is the partition or virtual device. But I'm a little confused as to why the sda# only comes up some of the time, or only on certain systems. ...
23
votes
2answers
17k 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 ...
0
votes
1answer
27 views

Jetstor SAN disk firmware

We have a jetstor SAN, specifically http://www.9to5computer.com/AC&NC/JetStor%20SATA%20412iS%20iSCSI%20to%20SATA%20Rackmount%20Raid.htm and now discontinued. Its run for 6 years and just hit end ...
3
votes
3answers
1k views

It is possible move a specific file to the beginning of the disk?

It is possible move a specific file to the beginning of the disk? I want to move my virtual machine disk files (virtual disk) to the beginning of the disk to improve disk access performance. I believe ...
6
votes
2answers
307 views

HP ProLiant Server Drive compatibility

I have a DL360 g7 & a DL380 g8 server in my office, and I'm interested in replacing my g8 drives for newer drives with more storage space. My question is - are the g8 drives compatible in the g7 ...
0
votes
0answers
13 views

Dell PowerEdge T310 Drive Removal

I have a Dell PowerEdge T310 with a single WDC WD2003FYYS-02W0B0 hard drive connected to the front panal to a SAS 6i/R Integrated Controller. I have an identical WDC WD2003FYYS-02W0B0 that I use to ...
0
votes
0answers
40 views

How to find which db/collection/query triggers disk read?

We're running a MongoDB 3.0 server with multiple users accessing it and we're experiencing very frequent disk reads by mongod process utilizing our SSD drives to 100% During these peaks the page ...
6
votes
3answers
45k views

Reinserted a RAID disk. Defined as foreign. Is import or clear the correct choice?

I have re-inserted a RAID disk, on a DELL server with Windows Server 2008. The drive-status indicator was changing between a green and amber light, and the monitor gave the following message: ...
1
vote
3answers
40 views

NAS drive in a desktop system

I know that NAS drives are specifically designed for the constant usage. meaning a system that is on 100% of the time. Is it possible to install these drives in a desktop computer that needs a more ...
4
votes
5answers
7k 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 ...
2
votes
2answers
93 views

JBOD server for ZFS without dedicated boot drive

I am looking at buying a cost-effective machine for using openAttic, which is simply Ubuntu 14.04 64bit with ZFS. The server I am looking at gives me 8 bays of 3.5", where I plan to put SAS 7.2k ...
0
votes
1answer
21 views

LSI MegaRAID 9271-8i RAID1 disk expansion

I have a RAID1 setup with two 3TB disk, is it possible for me to buy two 4TB disk and expand my DiskGroup?