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

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0
votes
1answer
64 views

PostgreSQL queries slower than before?

I am using PostgreSQL 9.3 server on my production server. Everything had been working fine for the past couple of months. But since the past week or so, PostgreSQL seems to have becomes very slow with ...
2
votes
0answers
301 views

Windows Server Backup [2012 R2] - Went from 100+ copies available to 1 copy available overnight

I'm using Windows Server Backup on a Windows Server 2012 R2 system that has been in production for half a year or so. The server has around 60GB used, and the backup drive is a 160GB external drive ...
2
votes
2answers
90 views

HP ProLiant Server HDDs - Buy Spare Parts vs. Retail

sometimes i have to upgrade HP Servers. For example when they get a new "job" to do. So lets say i need some more HDDs for an DL360 G7 Server. If the Server has an active HP Care Pack, does it matter ...
6
votes
3answers
495 views

Is disk serial readable from supermicro chassis?

We are working with a hosting company for managing our dedicated servers. We asked for a replacement disk on one of the servers by providing the serial number. They took out 2 other disks instead and ...
0
votes
0answers
106 views

How is it possible for reallocated sector count to decrease?

The reallocated sector count of a disk in a RAID array has been increasing over the past 6 months, but now it seems as though the reallocated sector count has decreased. A month ago (according to ...
0
votes
0answers
35 views

Server drives gives input/output error when formatting in Fedora

I am at a total loss as to why this is happening. I have tried everything I can think of. I am trying to format a drive in Fedora to use in the server. Every time I try to format it I get a ...
0
votes
0answers
163 views

Replacing failed drive on a ESXi host

I have a failing drive on my ESXi 4 host and I'm going to replace it. There is no fault tolerance (RAID), each drive on its own. I'm planning do offline dding old drive to new one but I'm not sure ...
0
votes
0answers
131 views

Azure disk performance

I am running on-demand, research D14 instance in Azure South Central US region, with a 4-disk RAID0. Recently the disk performance has become unusably slow, particularly the RAID performance, which is ...
0
votes
0answers
68 views

Linux quota - wrong disk usage

I'm using centos 6 and quota shows wrong disk usage for all users... Something like multiply real disk usage... # quota -v myuser Disk quotas for user myuser (uid 511): Filesystem blocks ...
0
votes
0answers
50 views

Additional hard drive not detected in BIOS

So I'm working on a server which has a Tyan S2937 motherboard, and 2 CPUs. I have a drive bay capable of supporting 6 drives, and the motherboard has 6 SATA connectors. I want to setup the system ...
0
votes
1answer
67 views

Why my AWS volume size is different from the actual size?

It's very wried to see my actual disk size is much less than the actual size. From the information, looks this disk is not be partitioned. I have no idea why the actual size is 20G but disk size is ...
2
votes
3answers
65 views

Accessing multiple disks under single virtual partition?

I have disks as below on my Debian server: /dev/sda1 276M 29M 233M 11% /boot /dev/sdb1 917G 793G 79G 92% /home /dev/sdc1 1.8T 1.7T 79G 96% /home2 /dev/sdd1 1.8T 1.7T 79G 96% ...
1
vote
3answers
68 views

distributing tables over multiple harddrives

Is there a performance improvement when I distribute database tables over different harddrives? I need to access many different schemas at the same time and I was wondering if adding more harddrives ...
1
vote
0answers
82 views

Are /dev/disk/by-id symlinks unreliable?

I am provisioning a Nova server and Cinder volumes using a Heat template. In order to identify the Cinder volumes attached to my OpenStack server I would like to use the /dev/disk/by-id/... symlinks ...
5
votes
1answer
272 views

Is it possible to calculate where is, physically, a bad block located on a hard disk?

I dd_rescue'd a hard drive, and I know where the bad blocks are. I still have the drive with me, so I can get any information needed from SMART or fdisk. I would like to know if it is possible to ...
0
votes
0answers
77 views

mdadm: can't remove broken drive from raid1

I have a ubuntu server Ubuntu 12.04.5 LTS (GNU/Linux 3.2.0-34-generic x86_64) that uses a software raid with 2 physical drives. Apparently, one drive is unresponsive, and I try to remove it from ...
0
votes
1answer
58 views

Max Size of Disks Supported by Controller

I am interested in purchasing (second hand) a Dell Poweredge 2950 2nd Gen server. However, the specs say it has a max storage size of 4.5tb. I am wondering if this means just what is available to ...
-3
votes
3answers
1k views

Configuring RAID in HP Proliant ML350e Gen8 [duplicate]

We have purchased two stock HP ML350e Gen8 servers. Ubuntu 12.04 is to be installed in those. The stock, base unit have provision for 6 hard disks for creating RAID in which, one is filled with 500GB ...
2
votes
1answer
230 views

How to reacreate the EFI partiton and mirror and existing system partition of an GPT disk?

I have the following setup (very well possible that this is no good practice but it is the given situation): There were 2 x 3TB dynamic GPT disks in a Windows server, Disk0 with EFI (~200 MB), System ...
0
votes
1answer
61 views

How to generate random files and directories that are scattering across the whole partition? [closed]

I want to perform a heavy test of using "resize2fs" to shrink the file system. Currently, I have script that creates a few hundred thousand files taking several hundred GB. But it doesn't take very ...
0
votes
0answers
24 views

Hard Drive Recovery; Owned by 1001 and operations block

I'm trying to recover data from a crashed hard drive. I have a SATA to USB cable and I'm trying to pull the data onto a temporary machine. The drive mounts just fine. However, the drive is owned by ...
0
votes
1answer
120 views

Windows Software RAID with Bad Sector: Which drive is broken?

We have three Seagate drives in a Windows software RAID stripe arrangement. The server began to freeze up. I was running two backups simultaneously with Acronis and BackupChain and thought I ...
0
votes
0answers
159 views

External HDD wrong size

I have an very interesting problem with a Seagate HDD (3TB): Under Windows the HDD has a size of ~3TB. When I connect it to Ubuntu 14.04 and try to format it with GParted, GParted tells me that the ...
35
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 ...
0
votes
0answers
32 views

IBM XSeries 346 Ultra 320 hdd upgrade options

I recently acquired a IBM XSeries 364 server that I purchased to play around with(still in school), I figured at worst I can use it as a file server or TFS box. Now I realize that this machine was ...
2
votes
1answer
172 views

Why can't a GPT partitioned disk on SATA be read on USB?

If I GPT partition a 4TB disk when it is connected to SATA, then it works fine. If I take the disk and put in the an USB3 enclosure, then I get [root@localhost liveuser]# sfdisk /dev/sdb sfdisk: ...
-1
votes
1answer
37 views

Are there HDDs which tolerate high ambient temperatures?

For certain reasons I won't go into, I have this small server machine which tends to overheat. I don't have exact temperature measurements, but let's say something like... ID# ATTRIBUTE_NAME ...
5
votes
3answers
123 views

Shared Disk in modern data center (SAN, virtualization, etc)

I'm a developer...treading here on foreign terrain. Please pardon any naivete. I work on an application that stores data both in a database and the filesystem. Context: Clustering and Network ...
2
votes
2answers
600 views

SATA 7.2K HD Suitable for File Server

Just discussing a new Server with a client and they are insisting on using two 3Tb 7.2K SATA Driver in RAID 1. I wanted to get them 5 15K SAS Drives in RAID 5. Can anyone tell me what the true speed ...
0
votes
2answers
191 views

LSI MegaRaid - Image Drive from Failed RAID

I had a power failure and my LSI MegaRaid 3 disk SAS RAID 0 failed. My attempts to recover the RAID have also failed. I plan to rebuild the array and go with RAID 5 and add another SAS disk. ...
0
votes
1answer
84 views

Unclaimed disk space but no actual physical disk present

I am working with Ubuntu server 12.04 and earlier this week we detected a bad disk in /dev/sdl. I was not able to query its mount point and it also had failed SMART tests. Today I brought a brand new ...
1
vote
1answer
116 views

Touching ZFS volume causing OS to freeze, drives reportedly OK

Having massive issues with 4 brand new 3TB WD Red drives I just got. Trying to setup raidz2 using "native zfs" with all 4 on ubuntu 14.04.1, which works initially until I start trying to copy data ...
0
votes
1answer
190 views

Sql Server 2012 Disk I/O Too high

I am running SQL Server 2012 on windows azure VM Windows server 2012. This is a live Database, about 250GB, with high usage. I applied some best practice articles for the temp-db long ago, and also ...
1
vote
2answers
116 views

Install HP drive in Dell PowerEdge 2950?

First, I do agree that what I'm asking here is certainly unsupported by either HP or Dell. I'm just exploring some options here. The scenario: We have a server, a Dell PowerEdge 2950, running SQL ...
-2
votes
2answers
69 views

Adding second RAID controller to a motherboard with onboard RAID controller [closed]

One of our server ASUS M4N78AM motherboard that comes with an onboard RAID controller. We have already utilised it and are running out of space. Would it be possible to install an additional RAID ...
4
votes
1answer
169 views

HDD is acting up, but S.M.A.R.T says everything is fine

Before I begin, a quick disclaimer. I'm basically a developer forced into a sysadmin role by circumstances, so I apologize in advance if I say something stupid or seem like I don't know what I'm ...
1
vote
1answer
203 views

Hard drive error message in Virtual Root Server

After noticing a high load on our virtual root server (2 x 1 TB RAID 1 Subset) I have found these messages in /var/log/messages (CentOS): kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action ...
4
votes
3answers
2k views

Why do servers have SAS instead of SSDs? [closed]

I was wondering why do servers still come with SAS disks instead of SSD disks? I know that SAS are faster than normal hard drives but they are still much slower than SSDs. I think they are more ...
0
votes
0answers
91 views

Using a non-validated SED on a Dell R720

We were given a Dell R720 a couple years ago, and the machine currently has standard 300GB 3.5" SAS 15k drives. Our RAID controller is a Perc H710. We need to update our disks to FIPS 140-2 ...
1
vote
1answer
1k views

SCOM alert: The threshold for the Logical Disk\Avg. Disk sec/Transfer performance counter has been exceeded

We are monitoring several Windows Server 2012 R2 VMs running on Hyper-V. Now SCOM (2012 R2 UR2) reports: The threshold for the Logical Disk\Avg. Disk sec/Transfer performance counter has been ...
-5
votes
1answer
53 views

Hdd for server, will it work? [closed]

i have a server : IBM System x3250 M3 its have 2 HDD slots, but currently only have 1 HDD, that is : HDD 500 TB Hotplug, sata, with part number 9CA154-176 i want to add one more HDD, but i only ...
0
votes
1answer
61 views

Tracking down rogue disk usage

I found several other questions regarding the theory behind my problem (e.g. this, this), but I don't know how to apply the answers to my machine. # du -hsx / 11000283 / # df -kT / Filesystem ...
0
votes
0answers
41 views

Get physical drive size from command line

Is there a command that tells me whether I have 2.5 or 3.5" drives in a system?
1
vote
1answer
127 views

Using Seagate 3TB drives with a Dell PERC 710 - do I have to worry about align and sector size?

I'm going to setup our new server with 8 3TB HDD from Seagate. They come, as far as I know, internally with 4K sectors. I've run this past weekend some burn-in tests on the disks, before setting them ...
-1
votes
2answers
140 views

iostat reporting low r/s on first line for specific disk, expected r/s on all following lines for that same disk

When copying data from hard disk sdc to sda, I notice that the number of read requests completed per second was unusually low: $ iostat -x 1 1 Linux 3.13.0-32-generic (melancholy) 2014-08-15 ...
1
vote
3answers
91 views

How do I restrict a removable NTFS drive to domain access only? [closed]

A fixed NTFS drive in my computer requires a login by me, or if on the corporate network, a login by any domain user. So if the drive is stolen, no one can get at it - correct? But a removable drive ...
1
vote
1answer
74 views

Extract data from server without causing high disk IO

My current diagnosis is that there is a hardware fault, either related to the memory of the hardware RAID controller or something related to the extra juice the hard drives requires when running on ...
0
votes
2answers
523 views

Dell PowerEdge 1850 Amber Light

Update: I swapped my power supplies in the back and everything started powering up, fans RPM was monentarily higher than idle, with a blue light on front. Then the amber came back for a moment, then ...
-1
votes
1answer
585 views

How to access a system with write permission after file system check fails?

I created three new partitions, but after a reboot, the system is being dropped to a shell: /dev/mapper/group-newpartition: clean, 11/655360 files, 276620/2621440 blocks [FAILED] An error occurred ...
0
votes
1answer
41 views

“Core Charge” on defective server HDDs

I have collected a pretty decent amount of SAS and SCSI disks over the years that have a predictive failure warning. I was just about to throw them all out, but wondered if any of the manufacturers ...