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

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2
votes
1answer
317 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
68 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
26 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
150 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
194 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 ...
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 ...
0
votes
0answers
49 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
220 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
39 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
151 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
657 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
218 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
108 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
138 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
218 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
153 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
82 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 ...
5
votes
1answer
188 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
245 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
111 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
2k 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
55 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
70 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
42 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
141 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
179 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
98 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
75 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
646 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
770 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
42 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 ...
3
votes
3answers
232 views

Power down disk array

I have a Supermicro server with an external disk array connected using SAS. Assuming I have already shut down the server properly, is there anything I should do before I can power down the disk array ...
0
votes
1answer
63 views

Need to install and patch 700 hard drives, hardware or software?

I have 700 laptops that need patching after being offline for an extended period, and need to be ready to go in a 3 day timespan start to finish. They are running windows 7. We have SCCM 2012 as an ...
0
votes
1answer
42 views

How to alleviate high disk reads on server?

We are currently hosting a 3TB library of image galleries on our web server, all searchable by users. With about 400 active users at a certain time on the website, our disk reads are pushing 100% I/O ...
0
votes
0answers
71 views

100% disk usage Windows server 2008

We have HP Proliant G6 server with 4 1.5Tb SATA disks. 2 RAID 1 arrays and 2 logical drives 1.5Tb. One day ago I mentioned twith resmon that disk usage is 100% and i\o speed is not more then 4Mb\s ...
1
vote
1answer
5k views

Can't mount disk (VFS: Can't find ext4 filesystem)

Tried to mount a disk (hardware raid) but failed. #mount -t ext4 /dev/sda /data mount: wrong fs type, bad option, bad superblock on /dev/sda, missing codepage or helper program, or other ...
0
votes
2answers
97 views

Measuring disk usage

What is the fairest unit to determine the disk usage (except the total storage usage e.g. in GB)? IOPS? Bytes read / write? Bytes transferred over network (would be equal to Bytes r/w)? Other? And ...
0
votes
1answer
96 views

How to create two partitions with same size?

I created two partitions using the following commands. parted /dev/sda --script -- mkpart primary 1 50001 parted /dev/sda --script -- mkpart primary 1948001 1998001 Each partition should have 50001 ...
0
votes
1answer
188 views

Leveraging rsync for a local copy between two slow drives, benefits without a daemon

I am confused by the benefits of rsync (3.1.1) if there is no daemon running remotely, e.g. copying from a drive mounted via SMB2 (via a VPN) to an external HDD (USB 2.0, sadly). Both connections are ...
1
vote
0answers
23 views

smartd rule does not work

I have an issue with smartd. I've studied its man page, and then I've set the SMART daemon to run long test of the hard disks two times a month and alert to the specified mail address in case of ...
4
votes
3answers
2k views

input/output error at clean ext3 partition - how to check what wrong with data block

I have a problem with a file at a ext3 partition on CentOS 5 server (kernel version 2.6.18-164.15.1.el5) with a HP Raid Controller: hpacucli ctrl all show detail Smart Array P410 in Slot 1 Bus ...
0
votes
0answers
500 views

XenServer 6.2 Read Only and Slow Disk I/O

I virtualized a datacenter a few months back and we have a pool of 3 HP DL360 G5 servers, each with 32GB of Memory and dual Intel Xeons. Recently we have been experiencing 2 issues, the first of which ...
1
vote
2answers
163 views

ncq not supported on an SATA3.0 HDD in an usb 3.0 casing

is there a well known reason why a SATA3.0 HDD supporting NCQ does not have NCQ queue depth configured when mounted from an usb 3.0 case ? output for hdparm -iI /dev/sda shows NCQ is supported output ...
-2
votes
1answer
535 views

Why does a low level format take very long time?

I can write ~100MB/s on a particular 4TB SAS drive when it have a file system on it, but a low level format on this drive took >16 hours. That's ~70kB/s. Since there is not filesystem and only zeroes ...
-1
votes
1answer
134 views

mdadm reports faulty disk, but smart doesn't find problems

I've got a 9 disk raid 5 array. Today i got a mail from my server: This is an automatically generated mail message from mdadm running on Eldorado A Fail event had been detected on md device ...
-1
votes
1answer
838 views

windows rsync from different local drive, other than c, to remote

rsync -avz D:/test me@my.server.com:/test I am using cwrsync on a windows7 box rsyncing to a linux box. Everything works fine when i am going from a relative path on drive C.. but i need to rsync ...
18
votes
2answers
424 views

An unknown tool is wiping our Virtual Machines and we can't ID it

A console view of a Windows 2008 R2 VM, on vSphere is showing the following screen: "Operation 2 of 2" "Wiping disk" Can someone advise on what this program is? Some information on this mystery: ...
0
votes
1answer
478 views

How does loss of DWORD synchronization affect the health of an SAS disk?

I tried to get more information from the error log of an SAS disk by running the following command that prints values and descriptions of the SAS (SSP) Protocol Specific log page. # smartctl -d scsi ...
4
votes
1answer
2k views

No space left on device - wrong size

I'm running an FreeBSD dedicated server. I am getting messages that I have ran out of space on the device. df -h is saying that I have no space left but du -sh /* doesn't even show the directiories ...