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

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2
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2answers
138 views

How to list basic information about disks (cylinders, heads, sectors, sector size) on Windows 7 and 10

On Linux, fdisk supplies this information without any problems. I can't seem to do the same anywhere in Windows, nor (at a glance) in diskpart which is intended to succeed/replace fdisk. I need to ...
0
votes
0answers
28 views

Error on one of four drives, cannot format or read

I'm having weird problems with a small SSD drive, F: (120GB). C:\Users\Administrator>chkdsk f: The type of the file system is RAW. CHKDSK is not available for RAW drives. Server management ...
-2
votes
1answer
60 views

Incorrect Disk space usage in Linux server [duplicate]

I can see the used disk quota on server is 81G for partition /dev/sda3 mounted to '/' as follows. Filesystem Size Used Avail Use% Mounted on /dev/sda3 106G 81G 20G 81% / tmpfs ...
0
votes
0answers
18 views

External drive not recognised and internal disk fills up.

I haven't been able to find anything on this in the interwebs - just guides to repair/fix external drives... In my case, when Mac OS tries to mount the external drive in question the internal disk ...
0
votes
0answers
34 views

linux block size - different in different places

When I'm checking block size via: blockdev --getbsz /dev/sda I'm getting: 4096 But when I use cat /sys/block/sda/queue/physical_block_size or cat /sys/block/sda/queue/logical_block_size I'm getting ...
2
votes
1answer
67 views

Storage Space Write cache, and write speed

Hey guys i have been working on my NAS that is using server 2012r2 with storage spaces. the drives are off the shelf 7200 rpm drives the drives are bitlocker encrypted the drives are in a 8 disk ...
0
votes
1answer
59 views

Is it possible to reset S.M.A.R.T. Spin_Retry_Count?

I have a 20-bay nas that uses Norco 5 in 2 hard drive cages. It's been at about half capacity most of it's life, but I recently added 5 new drives too it and ever since I've just been having sporadic ...
0
votes
0answers
21 views

Understanding EC2 disk usage metric

I am running a large machine with 60G RAM and 120G swp on EC2. The performance is not as expected. CPU seems not the bottleneck. I suspect the (ephemeral not EBS) disk IO is the problem. I checked ...
1
vote
0answers
61 views

Read only file system after every reboot - centos

Some time ago I got disk full problem and after that everytime I reboot my centos server, the system loads with read only system files. Running mount -o remount,rw / will solve my problem. But ...
-3
votes
1answer
179 views

HP ProLiant DL180 Gen9 modding/cabling [closed]

I bought a HP ProLiant DL180 Gen9 server in 12LFF drives configuration. Now I'd like to put two additional 2.5" SATA drives inside the case to serve as system drives. As there isn't a default spot ...
0
votes
1answer
39 views

HP MICROSERVER GEN8 819185-421hard drives not recognized in the front bay

I bought that server and a SEAGATE ST1000DM003 1TB Hard drive. I've installed ubuntu 14.04 LTS on a SD card on the server. It seems that the server doesn't recognise the 1TB hard drive in the front ...
0
votes
1answer
31 views

Expanding partition (xfs) of a virtual machine

OS: Ubuntu 14.04, partition table: Model: VMware Virtual disk (scsi) Disk /dev/sda: 37.6GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type ...
0
votes
1answer
28 views

HP Hard Drive ABC Slots

Ok so I have a hard drive that went out and a replacement drive was ordered per the same part # from the bad drive. On these driver there are 3 slots with tabs on these drives labeled A B C. The BAD ...
1
vote
1answer
76 views

Selecting an SSD to act as boot volume in an HP server

A question I recently asked regarding the use of enterprise 10k vs. 7.2k midline SAS disks led to some suggestions that the use of a mirrored pair of SSDs as a boot volume can make sense because: ...
3
votes
1answer
199 views

Reduce writes from a specific application?

I'm logging the output of a command with command | tee file This causes tee to actually write to the disk every second or so. I'd like to reduce the frequency of the writes, by caching the output ...
0
votes
1answer
39 views

Why my disk elevator is set to “deadline”

I have CentOS 6.x Linux server with kernel 2.6.32-573.8.1.el6.x86_64. I did some checks today and I found that disk elevator is "deadline". [root@srv ~]# cat /sys/block/sda/queue/scheduler noop ...
0
votes
1answer
29 views

How to distribute file storage to a different filesystem with Ubuntu 14.04?

First of: I just got started using CLIs to manage a whole server, sorry if this question is stupid, but I couldn't find any solution to this. I ran into a problem with apt-get -f install, because my ...
2
votes
0answers
45 views

What are the various factors that limits disk read and write speeds and on a network? [closed]

How to choose a server which: has high I/O performance of storage is highly flexible in terms of adding more storage So, basically these servers should act as storage servers for OST in lustre ...
1
vote
1answer
59 views

How to find out raid in linux: cat /sys/block/sda/device/raid_level vs dmraid -s in Redhat?

I am trying to find what raid level and what storage controllers are there in my remote HP server. I can find out the following details which storage controller, size of the disk, model etc. But ...
2
votes
3answers
235 views

How to automatically detect inserted SATA disk in Solaris if cfgadm status is disconnected?

My goal is to automate a backup routine on a small OpenSolaris NAS (running OmniOS + napp-it on a HP Microserver N54L) in combination with SATA disks. Background: I have installed one of those 5.25" ...
0
votes
2answers
75 views

Does the backplane on an HP server have any impact on the speed of the drives?

I have an HP Proliant DL380 Gen7. The server currently has no drives and is running on the integrated smart array controller. I was looking into replacing the controller with an LSI-9211-8i controller ...
0
votes
0answers
26 views

zfs Disk in pool accidentally pulled now shows pool degraded

I have a pool with 10 disks and we accidentally pulled the wrong disk and now the pool shows degraded, and suggests using zpool recover. Can we just "zpool scrub sdbe" to get the disk resilvered and ...
0
votes
1answer
76 views

iSCSI opcode[89], error(-65539)

I have error iSCSI target (Synology DS1813+) used as NAS: Jan 19 12:03:55 SRV1 kernel: [23311947.266497] iSCSI: iSCSI: EPIO[/volume1/@iSCSITrg/iSCSI_3_Extent_LUN-LUN1_000], opcode[89], error(-...
19
votes
3answers
2k views

Can “enterprise” drives be safely replaced by near/midline in some situations?

When specifying servers, like (I would assume) many engineers who aren't experts in storage, I'll generally play it safe (and perhaps be a slave to marketing) by standardising on a minimum of 10k SAS ...
0
votes
1answer
34 views

Bit copied a disk image using the dd command to a new and bigger disk. How do expand whole LVM? [duplicate]

I just copied a 50 GB disk image using dd for bit copying to a new harddisk with 200 GB storage. On the disk is LVM including the system partition EXT4 and a swap partition (both LVs). Well the copy ...
1
vote
0answers
31 views

Is my drive good or going bad?

I just ran SMART on my server's drives but I'm not too sure how to interpret it. My results seem like the drive is doing fine, but I would like a second (or third) opinion, just to be safe. Here are ...
0
votes
2answers
39 views

Ran smartctl on my drive, not sure if this is good or bad

I've been having problems with a drive in my Synology diskstation. I saw the following errors pop up on my /var/log/messages: ata6.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen ata6....
0
votes
0answers
14 views

Best practices for sizing RAID 6 arrays? [duplicate]

I'm wondering what the best practices are for sizing raid 6 arrays. For example: At what point is it better to use multiple arrays or RAID 60? is spindle count the only factor? If reliability is ...
1
vote
2answers
102 views

ESXI 5.5 Doesn't see full hard drive

I have an ESXI 5.5 host which I've had up for a while (whitebox build) and I've recently replaced one of the internal hard drives due to failure (not raid, directly connected to the SATA controller). ...
0
votes
2answers
143 views

Is it documented anywhere that adding a disk to a Azure VM causes an unconditional reboot?

I've noticed that adding a new disk to an Ubuntu 14.04 VM running on Azure, caused an unconditional reboot of the Azure VM. When I added a second disk, the VM wasn't rebooted, but the first disk was ...
2
votes
2answers
174 views

Does any SATA drive work in any SATA port?

I was under the assumption (apart from restrictions due to old operating systems not being able to read large drives) that as long as a hard drive was of the same type as what is available for the ...
2
votes
1answer
73 views

Reliability of S.M.A.R.T. Selftest

I let smartd check my hard drives regularly. Recently I have been notified about a failed short selftest on one of my hard-drivers. smartctl 6.4 2014-10-07 r4002 [x86_64-linux-3.16.0-0.bpo.4-amd64] ...
3
votes
0answers
131 views

What causes SCSI command timeout over 30 seconds?

System description: CentOS 7. SuperMicro X9DRW-iF board. Latest BIOS (and SCU option ROM), using SCU option ROM. Four 300GB WD HDDs connected to the board's SCU. Six HDDs connected to the six ...
-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
28 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
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 ...
16
votes
1answer
684 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
771 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. ...
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
412 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 ...
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
659 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 ...
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 ...
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" ...
1
vote
1answer
100 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 ...
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
84 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\...
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 ...