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

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-2
votes
1answer
36 views

External Drives on RAID/LVM configuration

I had 2 drives corrupted and now replaced with new ones sitting on RAID 0. After installing the new drives I have attached the 2 old corrupted drives via usb to retrieve data from them. These 2 drives ...
0
votes
1answer
29 views

Backup old disk to external disk (new)

One of the 2 x 500GB drives on server is crashed can read but not write the data, which both are on Hardware RAID 0. So I connected an external 1TB new drive to backup the data and replace those 2 x ...
0
votes
2answers
14k 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 ...
0
votes
1answer
263 views

Interpreting /var/log/messages output after server freezed

My server freezed. I restarted, and after running fsck manually, services restarted normally. I'm analyzing /var/log/messages around the time of the fault, and I found these entries: Nov 29 22:24:27 ...
-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 ...
16
votes
1answer
687 views

Why does `df` indicate no available space when used is much less than total size, on my VPS? [duplicate]

My VPS display this with df -h Filesystem Size Used Avail Use% Mounted on /dev/simfs 100G 46G 0 100% / Does anyone have a idea to fix this ?
0
votes
1answer
798 views

S.M.A.R.T. error , 190 Airflow_Temperature_Cel , Is it a risk?

Please, I received this report by S.M.A.R.T Checking /dev/sdb.... Errors: Please note the following marginal Attributes: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED ...
0
votes
1answer
63 views

mdadm: can I reconnect a USB disk as SATA without needing a rebuild?

In my server there's an mdadm RAID-1 array consisting of two SATA disks, named sdb and sdc. The sdb disk might fail soon (according to SMART data), and I want to replace it with a newly bought disk. ...
6
votes
2answers
5k views

How to determine which file/inode occupies a given sector

I received messages in /var/log/kern.log that indicate drive failure. The messages occured while copying my $HOME between drives (ext4 -> ext3): [ 5733.186033] sd 4:0:0:0: [sdb] Unhandled sense code [...
4
votes
4answers
6k views

Are new HP Gen8 servers compatible with g7 drives?

Are HP Gen8 servers (namely DL380 Gen8 with 2.5" HP disks) compatible with 2.5" harddrives from G5-G7 servers? I mean original HP disks in HP caddies not plain SAS/SATA drives.
0
votes
1answer
40 views

DegradedArray event on /dev/md2

I am getting the following error on my Proxmox server. It has happened multiple times over the last few days now. How am I able to test if the RAID hard drive is faulty? This is an automatically ...
2
votes
1answer
433 views

How to see disk usage graph on Windows Server 2012

I experience a huge slow-down on server. And the more I inspect, the less I find out what's going on wrong there. I think it might be related to I/O. On local PC, I can open Task Manager, and see the ...
-1
votes
3answers
78 views

CentOS 7 server rebooted itself into rescue mode - how can I find out why?

I've switched it back to regular boot and it seems to boot up fine. So why did it reboot? Running "last" doesn't even show a log OF a reboot. What does that suggest? When I try "smartctl -a /dev/...
144
votes
2answers
28k views

What are the different widely used RAID levels and when should I consider them?

This is a Canonical Question about RAID levels. What are: the RAID levels typically used (including the RAID-Z family)? deployments are they commonly found in? benefits and pitfalls of each?
0
votes
2answers
50 views

80 pin SCSI Raid Controller to SATA SSD's on IBM e336

I have an Old IBM e336 1U Sever. Currently the only Hard drive in the system is a Ultra160 SCSI drive. This drive is old and making some noises indicating that its life is going to end soon. Though ...
2
votes
1answer
675 views

HP Code 341 “Physical Drive State: Predictive failure. This physical drive is predicted to fail soon.”

this is my first post so bear with me here :-) Background: I have a RAID5 setup with 4 disks that have been working perfect for years. After one drive failed, I installed new drives which where ...
1
vote
1answer
37 views

Our app lags “randomly” due to Disk I/O issues?

We have made an app that requires hundreds of images downloaded for each user every day. Our basic server setup is as follows: Loadbalancer -> Nginx -> Databaseserver However, our app "randomly" ...
0
votes
0answers
27 views

Hot Swap Disk With One Disk Failed and One Predictive Fail in Same Array

I have a RAID 10 Array sitting on a HP Smart Array P410i controller. One disk has an error status and one has a predictive failure status. Is it safe to replace the predictive failure disk and then ...
2
votes
1answer
219 views

Can I effectively clone my hard drive by using mirrored partitions in Win Server 2008?

I have a server running Win Server 2k8 R2 Foundation, functioning as a basic file server and CAD software licensing server, with the following situation: Originally installed with 2x 250GB physical ...
5
votes
2answers
13k views

Mixing dual and single port SAS disks

I have a HP DL380 G5 with 8x146GB single port SAS SSF disks (DG146ABAB4). A couple of them have failed and I can't find any new single port disks anymore. They all seem to be dual port. I'm wondering ...
1
vote
1answer
103 views

ZFS on a single external HDD drive: setup / tutorial and workflow [closed]

There are many tutorials on ZFS but I couldn't find a single one which covers the changes in commands when one uses only a single drive. I know by now that the parameter copies=2 is used but what ...
1
vote
0answers
19 views

What steps to follow new disk space is added to linux platform? [closed]

I am trying to learn linux environment. I have a VM based on RHEL 6.6 64-bit. One of system engineers told me he added 20GB disk space to the VM. If I want to use that disk space properly what steps I ...
9
votes
8answers
5k views

Equivalent of SysInternals FileMon for Linux?

I'm attempting to debug an application on Ubuntu - I need to listen to file open attempts (even for files that don't exist). Process Monitor (formerly known as FileMon) is available on Windows - what'...
0
votes
1answer
28 views

Change partitions of disk with RAID and LVM

TL;DR: How to combine RAID + LVM partitions online (not touching rootfs)? I have a server which was used for something else before and had a certain partition structure create. df -h shows ...
-1
votes
1answer
86 views

I launch stress-ng -d 9 and my server crashes

I'm trying to understand why my server crashes. It reboots itself after some minutes when launching stress-ng -d 9 The last logs I received are these ones: [pid 1547] write(3, "Z\26\260\2273\0Z\...
24
votes
2answers
2k views

What does SMART testing do and how does it work?

man smartctl states (SNIPPED for brevity): The first category, called "online" testing. The second category of testing is called "offline" testing. Normally, the disk will suspend offline ...
17
votes
4answers
1k views

Should you still spread a hard drive order over several vendors?

Once upon a time, I was taught that whenever I needed around six or more hard drives I should spread the order among at least two vendors, and three when the order gets up around 20 drives or more. ...
0
votes
0answers
33 views

ZFS and controller level mirroring

If there are more than one SCSI controllers on your machine - there are disks from each controller - is there an option within ZFS to create a mirror of an existing pool so that sub mirror is picked ...
4
votes
2answers
9k views

How do I add a second disk to my zfs root pool

I am trying to add a new disk to my zfs root pool. Here is my current config: # zpool status pool: rpool state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM ...
0
votes
2answers
2k 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
28 views

M5015 Disk controller - Replace failed disk used working disk

I have an IBM X3200 M3 machine with a M5015 SATA Disk controller (RAID 5). One of the disks has failed ie orange light flashing on the disk. I intend to replace the damaged disk with a used disk of ...
4
votes
2answers
6k views

how to unlock a ssd disk with hdparm?

I have a SSD disk with password protection, but the password lost long time ago... so I tried to earse the ATA security with "hdparm" command. with "hdparm -I", the disk information looks ...
35
votes
2answers
2k views

Unable to write to disk but disk isn't full

I am using Ubuntu 12.04 and can't write to any file, even as root, or do any other operation that requires writing. Neither can any process that needs to write, so they're all failing. df says I've ...
1
vote
2answers
115 views

Cloning a two partition HDD onto a smaller HDD and maintaining MBR

I have a hard disk(A) containing two partitions - A1 is a NTFS partition containing a windows OS, and A2 is an NTFS partition containing data. I want to copy both of these partitions onto a different, ...
0
votes
2answers
88 views

How can 8 SAS lanes support 1024 disks? [duplicate]

According to the LSI 9207-8e specs then it supports up to 1024 disks of 6Gb/s, which I don't quite understand, when it is only an 8 lane JBOD card. In my case, I have an HP D6000 with 70 disks as ...
0
votes
0answers
41 views

iostat -En command keep showing a removed disk

I have replaced a disk on a Solaris server (probably wrongly), which have an j4400 array connected. I unplug the disk and put a new one without unconfiguring, disconnecting etc the old one. The ...
1
vote
1answer
3k views

Raid Ready Hard Drive vs Standard Hard drives

What is the difference between normal data hard drives and Raid Ready Hard Drives? I am planning to build a server with 6x2TB hard drives and i have been quoted raid ready Hard drives nearly at 250$ ...
2
votes
1answer
883 views

Replacing a failed disk HP P2000 SAN - Invalid Metadata

On Friday I had an absolute disaster. I went to the datacenter in order to rack a new server and at the same time, took a new disk with me to replace a drive that had failed a couple of weeks back in ...
1
vote
1answer
184 views

Why are all drives dropping out of RAID when 1 fails? LSI9260-8i/IBM M5014

I've got an interesting problem I'm hoping you all can help me with. I have an IBM 5014 (the LSI 9260-8i equivalent) running two RAID10 virtual drives. The first is 4 WD RE4's, each 2TB, for a 4TB ...
0
votes
1answer
196 views

Multiple SSD's not showing up in ESXi 4.1

The previous configuration for my server was 4x 500GB Drives, 3x 2TB Drives, 1x 480GB SSD and I replace 3 of the 500GB with SSD to look like 1x 500GB, 3x 2TB, 4x 480GB SSD. The previous ...
14
votes
5answers
32k views

Howto check disk I/O utilisation per process

Im having a problem with a stalling Linux system and I have found sysstat/sar to report huge peaks in disk I/O utilization, average service time as well as average wait time at the time of the system ...
-2
votes
1answer
308 views

How can I get drive information for a remote Windows XP machine? [closed]

I need to get the manufacturer or at least the model of the hard disk installed on a remote Windows machine (running Windows XP; I'm on a Windows 7 machine). I know that I can use sysinfo.exe to see ...
0
votes
1answer
589 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, ...
1
vote
2answers
812 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 ...
0
votes
1answer
99 views

Possible to use internal LSI controllers in HP hosts?

Right now I have a HP ProLiant DL360p Gen8 with two SATA disks in the disk bays. These are the OS disks. I choose SATA disks to bypass the internal raid controller, so ZFS could do the raid. I now ...
0
votes
1answer
58 views

df show wrong output

My df -h output: root@haier-ubuntu:/# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/haier--ubuntu-root 457G 433G 691M 100% / none 4....
-1
votes
1answer
27 views

Are there any two-bay hardware bit/block level replication devices (perhaps RAID-1)? [closed]

Here's what I'm hoping to do: Have two drives in a hardware bay that can be pulled from the front without dissassembly Read and write to it as a single (NTFS) disk Be able to pull either drive and ...
0
votes
0answers
216 views

Mount a Synology hard drive in another Synology

I have a DS112 with a hard drive that started failing. The device cannot boot from the drive. I inserted it into my DS415+. The drive is recognized but has the status uninitialized. When I connect ...
31
votes
9answers
22k views

Reliability of ssd drives

The main advantage of SSD drives is better performance. I am interested in their reliability. Are SSD drives more reliable then normal hard drives? Some people say they must be because they have no ...
1
vote
2answers
417 views

How to get the attached disk size on FreeBSD

When I attach a disk to FreeBSD I can list any attached disks by doing: [root@freenas] ~# sysctl kern.disks kern.disks: xbd2 xbd1 ada0 [root@freenas] ~# How can I then find out the size of each ...