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

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0
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1answer
1k 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
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 ...
1
vote
2answers
32 views

Cloning LVM partitions

I need to clone a CentOS installation from a 1TB disk partitioned with LVM, to several identical machines. The disk is mostly empty since only the operating system and some software are installed and ...
0
votes
1answer
18 views

Munin disk utilization calculation.

I have got intel ssd(series 530, 480gb). Data from intel site: Sequential Read - 540 MB/s Sequential Write - 490 MB/s Random Read - 48000 IOPS Random Write - 80000 IOPS Current load is about 5000 ...
-1
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2answers
5k views

Dell Power Edge R515 - Replacing a Bad Hard Drive in a RAID

I've ordered a new hard drive to replace a bad one in a Dell Power Edge R515. The manual covers obvious topics regarding physical replacing of hard drives, but I've never done this before on a ...
1
vote
1answer
34 views

Can't mount my hard drive

When I try to mount one of my hard drives, it can't locate the folder with the hard drive. This is the output for the command df: Filesystem 1K-blocks Used Available Use% ...
2
votes
5answers
3k views

Re-sizing disk partition linux/vm

I VM Player running a linux guest and I was wanting to know how do I expand the disk? In the VM player I gave more disk space but I am not sure how to mount/expand/connect the new disk space to the ...
1
vote
3answers
3k views

Clear the fault LED on an IBM x3650 M4 after accidental disk insertion and removal?

The server had a disk added, and then the operator realized they put the disk in the wrong server, so they pulled it out again. No harm done, the server is running and the disk was never actually ...
1
vote
1answer
988 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 ...
5
votes
16answers
3k views

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

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 ...
2
votes
0answers
20 views

Bus error with read-only file system on 9 out of 13 machines [migrated]

Machines are just hanging. I can't reboot with sudo reboot, because it gives me bus error. I see the message about read only file system and this kind of messages in dmesg I can guess that the ...
2
votes
1answer
57 views

Mounting degraded RAID

I've finally managed to assemble my RAID10 array again. I'm hoping there might now be a way through this. (There is history, if anyone is interested). I'm now getting: # cat /proc/mdstat ...
1
vote
0answers
168 views

dd from /dev/zero to /dev/sda does not overwrite the whole disk [migrated]

I issued dd command to zero out my hard disk. The command completed successfully but only part of the hard drive was overwritten: mint@mint ~ $ sudo dd if=/dev/zero of=/dev/sda dd: writing to ...
2
votes
2answers
123 views

Why does a ZFS resilver scan the entire pool?

I have a zpool where I have just replaced a failed disk, and started a resilvering to the new disk. What I don't understand is, why zpool status says it want to scan 129TB, when the size of the vdev ...
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 ...
1
vote
3answers
120 views

Hard disk / SSDs - detection and handling of errors - is silent data corruption reliably prevented?

When an error occurs on a drive, is it correct to assume that it will always be detected and reported to the OS (if software RAID such as mdadm) or RAID controller (if hardware RAID) as a failed read ...
1
vote
1answer
23 views

Is it ok to mkfs and mount the whole disk without partitionate

[root@VM_xxx_centos ~]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/vda1 8255928 7068948 767604 91% / /dev/vdb 516061624 5966928 483880296 2% /data2 As you ...
1
vote
0answers
233 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
vote
2answers
33 views

Having trouble mapping solaris drive paths to physical disks

I have a supermicro box with 24 drives in front and 12 drives in back. It's running x86 solaris 10 with zfs. Here is the output of zpool status: NAME STATE READ WRITE ...
-4
votes
2answers
68 views

Does this hard disk match with the HP ProLiant ML350 G5?

I've got an offering for the 300 GB SAS 10K 2,5" hard disk. Will this fit in my HP ProLiant ML350 G5 server. The description in the manual isn't that clear. I'm just don't want to buy something that ...
4
votes
2answers
135 views

99% disk IO spikes with Percona

So we have a server that has seemingly random spikes in disk I/O, going up to 99.x% at random times and for no obvious reason, staying high for a while, and then going back down. This didn't use to be ...
2
votes
1answer
534 views

Add Zabbix S.M.A.R.T. monitor to ESXi 5

I have a ESXi 5.1 host with 3 Hard Disk (1 SSD, 2 Magnetic) and I want to monitor them, especially for the S.M.A.R.T Data, that is critical and preannunce an HDD break. Since I'm really unfamiliar ...
0
votes
3answers
718 views

How to analyse performance ESXi NFS Copy between datastores

I'm having trouble with ESXi backup/restore performance. My setup: VMWare ESXi 5.0.0 on a HP ProLiant DL 360 G6, runnnig RAID 5 on a P410 SmartArray as SAS QNAP Nas (QNAP TS-809U-RP NAS 8 bays ...
1
vote
3answers
125 views

Migrate SAS disks from E200i to B320i Smart Array

I have an older HP ML350 G5 series server with 4 SAS 72GB hdds in RAID 0+1. It's down and beyond repair. So I was wondering would it work if I was just to plug those in newer server with B320i RAID ...
0
votes
1answer
87 views

FreeNAS is getting Uncorrectable parity/CRC errors

In my FreeNAS 9.3 installation I am getting more and more Uncorrectable parity/CRC errors (like these here: May 15 13:39:41 freenas (ada1:ahcich1:0:0:0): READ_FPDMA_QUEUED. ACB: 60 00 b8 0e 18 40 91 ...
6
votes
5answers
39k 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)
0
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2answers
35 views

defrag /x - consolidate free space not really working - W2K12

I am trying to shrink my 300GB partition. There is just 50GB used. So I used defrag c: /x which should consolidate free space ("Free-space consolidation is useful if you need to shrink a volume, and ...
0
votes
0answers
26 views

Defunct Disk Drive (DDD) in IBM ServeRAID 6i, RAID5 array

My RAID 5 array is "Critical (CRT)" Status, since one of its six 146GB 10k rpm is marked as defunct. Is it possible to replace the defective disk (FRU part number 32P0731) with a similar HP disk ...
0
votes
0answers
41 views

Popped in replacement harddrive in RAID 1 configuration; Seeing I/O but the drive is not recognized by OS or RAID controller

CentOS 5.11; Dell PowerEdge R410; Dell SAS 6/iR Integrated Blades RAID Controller. Have two drives, both in a RAID 1 array. First drive failed. Pulled it out and popped in a new drive (same brand ...
0
votes
1answer
2k 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
votes
1answer
51 views

how to identify which physical drive(s) correspond to an entry in /etc/fstab [duplicate]

Using Centos. Situation: I have multiple drives off of two RAID controllers. I also have multiple entries in the fstab, such as /dev/sdb, /dev/sdc, etc. What I need to know is how I can identify ...
0
votes
0answers
34 views

Replacing a HDD in FreeNAS

I got a message that said one of my hard drive was degraded and im trying to figure out how to check which drive it is. I did zpool status and I got this zpool status pool: BiggyD state: ...
3
votes
1answer
45 views

Bitlocker device name change

When imaging our PCs we generally create a temp name for our facilities to change the device name to whatever particular department fits their needs. The issue is we can't send out any devices without ...
0
votes
1answer
74 views

SAS-3 vs SAS-2 HDDs

What are the main differences between SAS-3 and SAS-2 HDDs? Are there performance differences? Suppose we are talking of 10k rpm disks, ~1 TB, in both cases. Regards,
1
vote
0answers
589 views

XenServer 6.2 Read Only and Slow Disk I/O

I virtualized a datacenter a few months back and we have a pool of 3 HP DL360 G5 servers, each with 32GB of Memory and dual Intel Xeons. Recently we have been experiencing 2 issues, the first of which ...
8
votes
6answers
4k 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 ...
0
votes
0answers
18 views

SAR returns 0 await, 0 util for mdraid volume

Trying to get a picture on what is going on with the disks in our environment, I'm gathering statistics using SAR. Why does "sar -d" return "0" for the await and util for an mdraid volume? I can see ...
2
votes
1answer
33 views

Does SAS server rotate always in it's default speed (like 10K, 15K)

I have some concerns about disk throughput in order to plan my SQL Server deployment. I know from experience that consumer SATA disks sometimes go into sleep mode when not used for a longer period. Do ...
0
votes
0answers
31 views

Mount LVM volume as external usb drive?

I'm trying to mount my old 2x500GB drives to the new server which has the same drive volume. Both have LVM structure but it's not working. root@server [/mnt/usb]# ls /dev/sd* /dev/sda /dev/sda2 ...
0
votes
1answer
42 views

Can I recreate a unit from a single drive RAID1 in a 3ware Raid controller?

I have a broken server and a broken disk on that same server on a RAID1 setup. I need to setup this same RAID unit, now on a new server, and from only 1 drive (since the other is broken). I moved ...
5
votes
2answers
199 views

raid controller data transfer rate

I'm going to buy an 8-port raid controller for which the declared data trasfer rate is "Up to 6Gb/s per port". The declared connectors are "Two mini-SAS SFF8088". The maximum number of supported ...
2
votes
5answers
5k views

Performance gains of putting Windows pagefile on separate partition (same disk)?

I am making a drive image that will be deployed to several computers, and I'm tweaking it for performance. It is a Windows XP image. Considering there is only one hard drive, will the machine gain ...
0
votes
2answers
237 views

How to correctly move application data to an attached disk on an Azure Linux VM

I have a Linux VM on Azure that originally came with a 30G OS disk. As I had an application that had accumulated a lot of data, I attached a new disk through the Azure Dashboard and here is how it ...
8
votes
2answers
346 views

Are there any notable advantages (or disadvantages) to using EFI firmware and GPT boot disks in an ESXi environment?

My basic question is, as the title asks: are there any notable advantages (or disadvantages) to using EFI firmware and GPT boot disks in an ESXi environment? By "notable," I mean anything other than ...
-1
votes
3answers
121 views

SSD hard drive compatibility with Dell 1U and Supermicro 1U [closed]

I have a Dell Poweredge 1850 1U and also a custom 1U Supermicro, both hot swappable drive bays. For some reason, it seems the hdd to ssd drive tray is not working with snapping in. I've used this ...
9
votes
5answers
5k views

How do I measure disk thrashing on linux?

How do I accurately observe and measure the amount of virtual memory utilization and activity on Linux? I know there is vmstat, but how do I interpret the results? Or, what is better?
-2
votes
3answers
163 views

Windows Server 2012 R2, having unexpectedly low disk performance or fault [closed]

We're a student association which have purchased an dedicated server to host game servers and similar. The server seems to experience occasional Disk-I/O bottlenecks. This is especially true when ...
18
votes
3answers
12k views

CentOS thinks Disk is busy, can't mount or fsck

I'm a longtime user, and first time question submitter. I've spent a full day searching this and many other sites for a solution, but I must resort to requesting assistance to resolve my situation. ...
3
votes
1answer
493 views

What is the value/cost of enabling “spread spectrum clocking” on my hard drives?

I'm building up a biggish NAS box (10x WD RE4 2TB SATA RAID10) and ran into some problems. During the course of my research, debugging, investigations, etc, I discovered a jumper on the physical ...
2
votes
1answer
81 views

Are RAID 5 systems suitable for larger disk sizes?

Why is it generally considered that RAID 5 systems are not suitable for larger disk sizes? Is the same true for RAID 6?