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

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36
votes
10answers
3k views

Linux on VMware - why use partitioning?

When installing Linux VMs in a virtualized environment (ESXi in my case), are there any compelling reasons to partition the disks (when using ext4) rather than just adding separate disks for each ...
1
vote
0answers
18 views

How do I interpret a very high Avg. Disk sec/Write perfmon value?

Short version: Is the perfmon screenshot shown below enough evidence to say "something is wrong with your storage system"? Long version: I am debugging a performance problem: Some SQL Server query ...
1
vote
2answers
532 views

Hotplug area too small error

I have VM running under RHEL6, which is running under HyperV. It has a lot of important soft installed, but does not have suffocating workload (~10% CPU is used). It's been really unstable recently ...
0
votes
3answers
62 views

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

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 ...
0
votes
0answers
7 views

IAAS hard disk storage transfers: Moving a GCE persistent disk to an AWS EBS disk?

Is there a way to export a Google Compute Engine persistent disk to an AWS Elastic Block Storage? Basically, they are both hard drives, so I wonder if there is a way to export one to the other. If ...
1
vote
2answers
51 views

Measuring external hdd's rough handling

An external USB hard drive periodically travels to and from my facility to update its files (it's for offsite backup). HDD, not SSD. How can I measure if it's being handled too roughly? I'd rather ...
44
votes
7answers
18k views

How can I successfully mount an 8-bit SCSI drive on a modern computer?

I have a number of internal 8-bit SCSI-1 drives that I'd like to archive for historical purposes. These are all the old NeXT Cubes and NeXTStations (monochrome and color) that were used by id ...
-1
votes
0answers
18 views

Solaris drive type unknown

I have a server running Solaris 11 with a disk array. I am getting following error when trying to mount the disks: indika@server:~# mount /dev/md/dsk/d14 /mnt/storage/ mount: /dev/md/dsk/d14 no such ...
1
vote
1answer
18 views

Disk errors Event ID 51 on LSI MegaRAID 9240-8i in RAID 1

I am working on a case of recurrent disk errors. Server is running Windows Server 2012 R2 Standard. There are two main disks on a mirrored RAID. There is also an additional drive that is used for ...
3
votes
2answers
41 views

Should I be concerned by frequent RAID warning message (unexpected sense - command aborted)?

I have a Fujitsu host (PRIMERGY RX300 S6) running Windows Server 2008 R2 and Hyper-V (Version 6.1) with two virtual servers (one Windows Server 2008 R2 and one Windows Server 2012). Our 25 employees ...
14
votes
2answers
7k views

Are RDX removable disks a good replacement for LTO tape?

Over a period of three weeks, I experienced six complete failures of LTO-1 and LTO-2 tape drives at client sites. Some had failed mechanisms. Others lost the ability to write reliably. These were HP ...
-1
votes
0answers
15 views

1Tb Hard drive showing 30Gb remaining [migrated]

I'm using Windows 7 64 (a Dell i5 box). I have a 1Tb C: drive with the following partitions: 39MB (OEM Partition) 13.15GB NTFS (Recovery partition) 918.32GB NTFS (Boot Partition) When I "Select ...
-1
votes
0answers
27 views

HP MSA 2040 drive not detecting

We are running the MSA 2040 with 1.2TB 10k SAS drives with no issues. But was just trying to get the 300GB 15K SAS drive on it. But it doesn't detect. According to the specification of this enclousre ...
0
votes
1answer
19 views

S.M.A.R.T long self test. Does the test continue after finding bad blocks?

I've been watching a SMART enabled HDD closely recently (connected to an OSX Server, which is not very helpful with SMART output out of the box). The drive is definitely failing- the heads click, ...
2
votes
5answers
2k 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
1answer
42 views

copy LVM partition to new disk

I have a question about making copy of LVM partition to new disk. I want co copy not to move data. My operating system is Debian. On LVM partition I have running Xen virtual systems. Information ...
1
vote
3answers
442 views

Extremely High Hard Disk Reading Usage

My VPS configuration is as follows: H.D.D = 25GB RAM = 256MB OS : CentOS 5.5 I received an email from server provider showing that my VPS H.D.D read usage is 137GB in one day. I have installed ...
2
votes
4answers
7k views

Missing HDD space - says 65GB used, selecting all folders shows 40GB used

Running Windows Server 2008, 74GB raptor drive and noticed we only had about 500MB left - yikes! So deleted some old backups we don't need, but can't track down where about 25GB seems to be taken up. ...
9
votes
3answers
698 views

Why are Large Form Factor (LFF) disks still fairly prevelant?

Small Form Factor (SFF) / 2.5" disks seem to have become more popular than LFF disks now due to them being preferable over LFF disks in many scenarios (lower power consumption, higher density, etc). ...
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
1answer
237 views

HDD compatibility to rebuild for RAID

Last year we build a RAID 1 with Western Digital 2 TB drive model number WD20EARS. Unfortunately one of the drives failed. We are unable to find any new drives of the same model number. What do we do? ...
3
votes
1answer
1k views

Rebuilding RAID 10 array with two failed drives

I have dedicated server with 4 HDD in hardware RAID 10 configuration and It worked fine until yesterday, when It started to crash randomly on couple minutes. I’ve contacted my data center and they’ve ...
0
votes
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 ...
0
votes
0answers
11 views

How Do I Securely Delete External Hard Drives Such as Western Digital MyBook? [duplicate]

I have server external drives in Windows, mounted as a drive letters, and I would like to securely wipe it for the purposes of reselling. Normally, I'd hook it up to this ...
3
votes
2answers
834 views

Linux disk usage analyser that acts like symlinks are real files

I am using git-annex, an extension to the DVCS git, which is designed for handling large files. It makes heavy use of symlinks. The actual large files are moved to the .git/annex directory and the ...
0
votes
2answers
34 views

Is disk's UUID a good identifier for disk?

My tool working among 100 disks, some of them may attach or detach from the server during the tool running. I want to use disk's UUID as disk's id, and I got the question: If some disk disk_1 got a ...
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 ...
0
votes
2answers
58 views

Server 2012 R2 System Disk Filling

This is a bit of a strange issue - the usual troubleshooting steps don't seem to apply. On a XenServer 6.2 host (with SP1), I have a guest VM that is running Windows Server 2012 R2 that functions as ...
12
votes
4answers
631 views

Hooking up many different external HDs simultaneously

I need a large amount of external storage for an upcoming project. I'm planning on purchasing 10 2TB external drives. I need them all hooked up to a single machine at the same time. What issues ...
-1
votes
0answers
9 views

BSOD crashes after a freeze period of 100% Highest Active Time while the Hard Disk actually appears to be idle [migrated]

After a few BSoD crashes of my Windows 7 that follow a period of semi-frozen environment, I have started monitoring my Resource Monitor to try to catch the culprit in act. The symptoms are: The ...
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 ...
0
votes
0answers
1k views

Creating a Password reset disk on Windows server 2008 R2 using an external hard drive

I started creating a reset password disk on my windows 2008 r2 server using an external hard drive which I have formated. The process starts as follows=- -Go to start -Open control panel -Go to ...
0
votes
2answers
27 views

Grow individual drive size in RAID5 array

My array is built of 3 hard drive of 2TB, I have 2 more free space and I would love to start to grow my array with 4TB hard drives, if I start to put 2 4TB hard drives and eventualy replace the 2TB ...
0
votes
0answers
30 views

hp proliant microserver not detecting hard drive

So, I've hit a bit of a wall with the HP Proliant Microserver N40L. I'm trying to install a new hard drive, 4 TB, but it's not being detected by the BIOS and thus, not the OS either. It just spins up, ...
51
votes
8answers
2k views

What are the advantages of tape drives?

IBM still develop and sell tape drives today. The capacity of them seems to be on a par with today's hard drives, but the search time and transfer rate are both significantly lower than that of hard ...
0
votes
1answer
44 views

Ubuntu remount a root mount that's changed to ro as rw without rebooting

Because of errors=remount-ro an underlying NFS blip caused my root mount to be remounted as read-only. I know there is nothing wrong I need to worry about. How can I remount this as rw without ...
-1
votes
0answers
73 views

Frequent disk usage by kworker, jbd2

So I came across my disk access light blinking an awful lot for what should be an idle processor. The Problem There's a kworker job usually named kworker/u16:n, where n is usually 0, 1, or 2 which, ...
3
votes
2answers
396 views

Two hard disks in Linux based server, have one sleep most of the time [closed]

I have two hard disks in my server. One of them is 300 GB and very silent. The other one is 750 GB and makes some noise (it's working perfectly, it's just not a silent drive). Both are connected ...
1
vote
1answer
64 views

Prevent HDDs from spinning up before shutdown in Ubuntu/ZoL/SAS2008 environment

I am running Ubuntu 14.04.2 with ZFS on Linux. As I ran out of SATA ports on my Asus M5A78L-M/USB3, I bought a Dell PERC H200 card and crossflashed it to LSI 9211-8i P19 IT mode firmware to ...
0
votes
2answers
600 views

Hard drives indication with controller MegaRAID SAS 9261-8i on HP Proliant DL320e Gen8. Is it possible?

Give me advice, please. My situation: There're the server HP ProLiant DL320e Gen8 and MegaRAID SAS 9261-8i RAID Controller. I installed Controller into server and I reconnected Mini-SAS cord from ...
-1
votes
1answer
27 views

Reuse hard-drive from ESXi 4.0 server in ESXi 5.5?

I have a server, which I would like to use in a new ESXi 5.5 server. It was used as a data store and contains VMs we would like to use on the new server. The hard-drive is SATA 3Gb which I believe ...
1
vote
1answer
28 views

mdadm: drive replacement shows up as spare and refuses to sync

Prelude I had the following devices in my /dev/md0 RAID 6: /dev/sd[abcdef] The following drives were also present, unrelated to the RAID: /dev/sd[gh] The following drives were part of a card reader ...
0
votes
1answer
12 views

Smartmontools ouput anlysys

I am trying understand the smartmontools, when I executed the command "smartctl -a /dev/sda" It shows the part of output with heading"SMART Self-test log structure revision number 1" under which a ...
0
votes
0answers
40 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 ...
1
vote
1answer
191 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 ...
2
votes
3answers
3k views

Unsupported 3TB drives - should we expect any issues?

We recently purchased a number of 3TB drives, only to realize later it was for a Dell server with a PERC 6i, and that >2TB drives are not supported. Based on the amount we paid though, the restocking ...
4
votes
2answers
54k views

How do I mount a “GPT Protective Partition” in Windows XP?

I formatted an external USB harddrive while it was connected to a 32-bit Windows 2003 Server Std. edition server. After loading it up with files, I moved it to my Windows XP SP3 where it didn't show ...
1
vote
0answers
35 views

Need to add new hdd on existing ubuntu server 12.04 [closed]

I'm having Ubuntu server 12.04LTS as my local with 500GB HDD. Now I added one more 500GB with this. But, I can't able to find the new one in /media. While trying with sudo fdisk -l I got 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?
13
votes
8answers
11k 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 ...