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

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1answer
25 views

freenas disc problems - smart error - how to repair zfs raid?

I have troubles with my freenas 9.2.1. It crashed today. Its running a fileserver on zfs jbod raid 2. I'm not sure what exactly causes the problems. The system is booting however reacting pretty slow. ...
3
votes
2answers
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 ...
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
2
votes
3answers
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 ...
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1answer
37 views

Are there HDDs which tolerate high ambient temperatures?

For certain reasons I won't go into, I have this small server machine which tends to overheat. I don't have exact temperature measurements, but let's say something like... ID# ATTRIBUTE_NAME ...
1
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4answers
8k views

Linux - How to figure out what harddrives are attached?

So I have a server that has a few harddrives in it, all formatted and mounted. However I'm told there is another drive attached to it. How do I find out what drives are attached? How do I find out the ...
0
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1answer
22 views

Disk Usage Analyzer on Synology

How can I get an overview of the disk usage on a Synology hard drives like this:
-1
votes
1answer
176 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
3answers
92 views

What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?

I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
-6
votes
0answers
30 views

find manufacturing date of hard disk [closed]

I need to find manufacturing date for following hard Drive / disk. Company: Samsung Model: SP4002H Serial Number: 0524J1FW343654 Capacity: 40 GB I think it is around March 2003. BUT I need an ...
1
vote
1answer
75 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 ...
0
votes
2answers
38 views

ESXi sees RAID1 as two hard drives

The server is Proliant ML330 G6. I've activated the embeded SATA RAID in BIOS. Created 1 logical drive in "Option Rom Configuration for Arrays" in RAID 0+1 that consists of two 1TB drives. So in other ...
0
votes
0answers
21 views

IBM x3950M2 server, no drives detected during windows install

I have an IBM x3950M2 (72236MU) server that was running Server 2012. I decided to swap some drives around and reinstall from scratch with Server 2012r2. However I am unable to get the windows ...
-1
votes
0answers
31 views

Cannot access shared files on the host machine as local admin

I had 3 windows 7 clients lose their connection to a Windows 2012 Essentials server and I have not been able to restore it. I also cannot access or even find the original files that were hosted on the ...
0
votes
0answers
3 views

Intel DG41WV IDE Port [migrated]

I have a hard disk (ATA/IDE). Intel motherboard, Intel DG41WV, is there a port for connecting ATA hard disk. I can see 4 ports for SATA. Is there a way to use the hard disk without using converters? ...
7
votes
4answers
8k 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
2answers
915 views

When reading SSD drive specs, what's the difference between MB/s and IOPS?

I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...
0
votes
1answer
981 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
1answer
33 views

“failed command: WRITE DMA” but SMART test says hard disk is OK

Recently I started receiving (in dmesg) such errors: [ 1569.944985] ata6.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 [ 1569.944991] ata6.01: BMDMA stat 0x44 [ 1569.944994] ata6.01: failed ...
0
votes
0answers
6 views

Does the Grub error “disk `hd0,gpt2' not found” mean my harddrive has crashed? [migrated]

I left my Linux box running overnight, and I came back the next morning to find this: Does this mean my harddrive has crashed or is crashing? Or, is this likely caused by some other issue and ...
1
vote
1answer
84 views

Determining if there are free slots in a drive bay remotely

I have a server in a rack at a data center I don't have access to, and I want to confirm that there are drive bays open before I order new hardware. There are two specific machines I need to know the ...
5
votes
2answers
17k views

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

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
896 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
468 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?
1
vote
3answers
86 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
491 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?
9
votes
5answers
81k 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
4answers
616 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
32 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
407 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
531 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
3k 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 ...
2
votes
4answers
340 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
271 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
894 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
71 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 ...
12
votes
4answers
18k 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
64 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
240 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
468 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
10k 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
26 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
1k 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
106 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
417 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?