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

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-1
votes
0answers
10 views

How to get back/recover/back up data from “broken” Hard Disk? [on hold]

On a PC with two Hard drives (with 2 partitions each), let's say A(SATA) and B(Samsung), with OS on hard drive A - the computer stopped working, it won't boot, it fell in a restart loop with black ...
0
votes
0answers
5 views

TestDisk doesn't write partition table

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 ...
-1
votes
1answer
18 views

A DegradedArray event had been detected

at morning cPanel send me this email This is an automatically generated mail message from mdadm running on A DegradedArray event had been detected on md device /dev/md/1. Faithfully yours, ...
-2
votes
0answers
13 views

Startup and hard disk issues [on hold]

I have had a Windows Server 2012 R2 with a HP hardware, as an app server in a domain for a few month now. Two days ago, the server won't boot beyond the first Window screen, and goes blank after that....
0
votes
0answers
19 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
20 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
43 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
13 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
1answer
23 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 ...
1
vote
2answers
54 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 ...
5
votes
2answers
279 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 ...
2
votes
0answers
32 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 ...
0
votes
0answers
12 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 ...
-1
votes
0answers
24 views

new hard drive on dell precision 490 not been detected [migrated]

I have been give an old computer dell precision 490 to run some tests on it and a new hard drive to install on it. But after placing the new hard drive and turning on the computer I get" Drive 0 not ...
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 ...
2
votes
2answers
66 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
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 ...
0
votes
1answer
16 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?
1
vote
0answers
47 views

Can't use unallocated space on a Win 2k8 R2 VM

I'm hoping someone can help me with this because after 2 days of googling I've come up with nothing. I have a file server that I have converted from a physical to a virtual on an ESXi 6 host. I have ...
4
votes
2answers
69 views

Massive performance degradation on sustained sequential write

I'm in the process of migrating data into LUKS partitions. Now that the operating system drive is running off LUKS, I tried to start migrating the data drives. Then the server stopped responding. ...
0
votes
1answer
46 views

NFS drive full even though du says it's not [closed]

I am experiencing a very weird behaviour of my backup drive that I can neither explain nor get fixed. I have an external drive mounted via NFS. I regularly call rsync jobs that backup files from my ...
0
votes
0answers
36 views

ZFS mirror migrated to other system with dd -> zpool import fails

I'm pretty new to ZFS and this might be an easy problem (but I don't find any discussions about how to do this): I've messed up a FreeBSD installation on a Root-on-ZFS mirrored ZFS Pool on a ...
1
vote
1answer
71 views

Disk IO Errors when writing / Linux + Windows / HDD is OK

The problem: I have a lot of Disk IO errors on my server, these are causing multiple server failures. VMs are rebooting because of IO errors "task xyz/sdaX blocked for more than 120 seconds" Backup ...
-1
votes
1answer
87 views

What incident may happen that stops a VM on Azure? [closed]

We were hosting a Website and a CMS at an external supplier. They told us that they host everything on Microsoft Azure. Yesterday I saw that my website was down and contacted them. Later that day they ...
0
votes
0answers
14 views

where is my disk space being used in Debian 5?, please advise [duplicate]

Untitled Document Hello i have a virtual server with a Debian disk of 13GB,3GB RAM, only 13% is free disk space. There is a Mysql database of 2GB I have executed a few of commands but it doesn'...
1
vote
1answer
17 views

How to make data up to date on a shareable disk connected to KVM guest?

I have 2 KVM guests running. One guest (let's call it the writing guest) writes to a virtio hdd (it's a lvm logical volume) periodically. Another guest (reading guest) reads from this disk (it's ...
1
vote
1answer
37 views

Find number of unused disk bays on a dell server running windows or ESXi

I have a project kicking off to implement a new backup solution across our estate of 1500 physical servers. One of the bits of info I need to get is how many drive slots are free on each server (so we ...
2
votes
3answers
122 views

SAS / SATA max number of connected disks vs performance

I would like to understand following things: When I have a motherboard with SATA 6gb/s and 8 ports, does it mean that every single port is able to provide 6bg/s speed to disk that is connected over ...
2
votes
0answers
16 views

Forking loads disk

I have a prefork/fork daemon. By atop I see, that master-process often consumes disk: PID TID RDDSK WRDSK WCANCL DSK CMD 16830 - 7264K 48696K 18624K 10% our daemon From strace I see, that it ...
2
votes
1answer
34 views

Weird smartctl output. Is my disk in danger?

I have a disk, that gets me kinda weird smartctl output. I have never seen such large nubmbers on other disks. Does anyone now how to interpret these ? Is the disk likely to be faulty ? SMART ...
0
votes
1answer
56 views

Google compute engine - shrinking disks

I have a 5TB HD and I want to shrink it to 2TB. I use Google Compute Engine PaaS. How can I do that? Can you suggest any tools to perform this manually if this cannot be solved by Google's tools?
1
vote
1answer
49 views

Why there is a difference in size reported by lsblk, gdisk and parted

[anaconda root@861767 ~]# lsblk /dev/sda NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk ├─sda1 8:1 0 512M 0 part └─sda2 8:2 0 465....
0
votes
0answers
33 views

Recovering Megaraid Storage Array After Power Outage

I suspect I know the answer to this (namely, that there is no hope whatsoever), but thought I'd take the liberty of asking the question in the unlikely event there may be some hope, however remote it ...
1
vote
1answer
45 views

Replace failed RAID 1 Drive on Intel Platform

Good afternoon, I have a Intel Server running Windows 2008 R2 Standard. It has a RMS25PB080 Raid controller card in with. It has two logical drives, a RAID 1 and a RAID 5. The one harddrive on the ...
0
votes
0answers
28 views

CentOS df misreports free disk space (due to mounted volume?)

I have a server with an LVM volume mounted under /mnt. When running df -h to check free disk space, it appears to show the space consumed under /mnt as being used in /: [root@monitor spool]# df -h ...
0
votes
1answer
39 views

Hard disk reporting incorrect size in BIOS

I have a server with a software RAID system. There are 4 disk in the array: 4 x 4TB model WD40EFRX-68WT0N0 I noticed that the OS was reporting one of the disks to be 3TB, so I rebooted and ...
4
votes
4answers
1k views

RAID 10 - many slow disks vs fewer fast disks

I am looking to buy HDDs for a single server which will be used as development server. The server will use ESXi as hypervisor and will have some but not too many virtual machines (web server, database ...
5
votes
1answer
107 views

Root-causing vastly different performance on iozone O_SYNC benchmark for two HDD manufacturers

I have two servers A and B with the following configuration: A: 4TB HDDs, with RAID 1 (MegaRAID SAS 2008), 128MB cache, no BBU, write-through mode, 7.2k RPM, manufacturer A. B: 1.5TB HDDs, with RAID ...
2
votes
1answer
37 views

mdadm: replace disk in a 4-disk RAID5 while it resyncs

I'm preparing a server with 4 disks assembled into software RAID5 during Debian 8 installation. Shortly after the system was configured, SMART detected an Offline Uncorrectable Sector error, so I ...
1
vote
0answers
35 views

Can you have an MBR partition and a GPT partition on the same RAID 5 VHD in Windows Server 2008 R2?

I have a Power Edge T610 with a PERC 6 RAID 5 Array, recently i posted a question about expanding the array with other drives and was able to use OMSA to add additional drives to the array and then ...
0
votes
0answers
20 views

Debian: USB HD Random Disconnect

I've a debian box (Sheevaplug) everything seems to be ok, however I've an external hard drive attached to the USB port and sometimes the drive seems to disconnect itself randomly... and connect, I get ...
0
votes
2answers
656 views

Azure VM change OS Disk

I've create an Azure VM in RM and have deleted the VM and Components expect the OSDisk in an Premium Storage Account (Blobs). Now i wouldd like to create an new VM and attach the OS Disk to the new VM....
0
votes
0answers
20 views

sg_format 512e to 4096

We have Hitachi 8TB Helium drives, which come in Advanced Format or otherwise known as 512e (4096 native sector to 512 emulated). I want to see if our systems can fully cope with 4096 native sector ...
0
votes
1answer
54 views

Error while Expanding Disk Space of virtual machine in Hyper-V server

I have one Virtual machine running on my hyper-v server which has allotted the disk space of 100GB, i have only created C drive in this machine and C drive of this machine is fully consumed due to ...
0
votes
1answer
40 views

Full /usr directory, but can only account for 1/8th of space

Having trouble finding the files causing space issues on my server. Running the "df -h" command results in: /dev/xvda1 ext3 4.0G 693M 3.3G 18% / /dev/mapper/vg00-usr ext4 8.9G 8.9G ...
0
votes
0answers
37 views

Can't mount SATA drives when moved from USB enclosure to internal

I have had 4 external drives connected over USB to my Dell Precision 490 workstation. They are in /etc/fstab by uuid and formated as UUID. UUID=04c37bff-b93e-440e-acd0-3d984ddb2ec3 /mnt/drive0 ext4 ...
2
votes
1answer
30 views

What happens to GPT Partition after OS Reinstallation

I plan to reinstall a server 2008 OS, but i have other 4TB hard disks (G:,H:,I:)with GPT. Would i loose the GPT config and all the data on other drives after reinstalling the OS on C:?
0
votes
1answer
56 views

Which RAID configuration is better for hypervised Virtual Machines with three 300GB SAS drives [duplicate]

Probably a noob question, but I'd like some guidance on which RAID configuration is best in this server scenario. I am aware of and understand the different RAID configurations, but am after guidance ...
0
votes
0answers
67 views

Server 2008 R2 does not boot and won't restore

A Server 2008R2 machine was found restarted, asking to insert a bootable disk. I booted from a DVD and tried to restore from a backup image made a day before to a separate HDD (with repartitioning and ...
0
votes
1answer
142 views

CentOS 6: SATA link down when scanning for unused drives

I recently inherited a CentOS 6 server with 8 installed hard drives. 6 of these drives were going to be configured as an LVM, but never got that far. The drives are installed and, from what I can tell,...