Disk storage is generally the permanent data storage of a server.
3
votes
0answers
20 views
Data syncing behavior for filesystems in Windows
In Linux mounting supports commit option, which is described in mount(8) man page as:
commit=nrsec
Sync all data and metadata every nrsec seconds. The default
value is 5 seconds. Zero ...
-1
votes
1answer
31 views
boot a non-raid disk on a server
I have a HP ML310e that I am trying to recover data off.
It has a RAID 10 array and I am wanting to boot a non-raid hard drive on the server.
I can't see this disk in the bios, so I can't boot from ...
0
votes
2answers
48 views
RAID 1 hard disks errors, file system is not mounting
I have a Server with 2 HDDs in soft RAID 1, the OS is Debian Wheezy. After some database testing, the file system has gone to read-only mode, after which I have rebooted the machine. The server is not ...
1
vote
0answers
20 views
Rebalance pooled disks
Using mhddfs multiple drives were pooled to form a big virtual mountpoint. Now using the mlimit option unbalancing is prevented, but the drives are already in an unbalanced state.
Is there a script ...
0
votes
1answer
33 views
Resize/extend partition size CentOS
Im tasked to resize a partition on a remote server. I've read up on it and understand that i'll need unmount and use resize2fs /dev/sdato expand the partition size. Can someone please help me unmount ...
0
votes
0answers
10 views
Xymon monitoring Filesystem of ESXi fails
I have a Xymon server which monitors my ESXi servers. Now if i try to check the disk of my ESXi, it fails in the xymoncmd:
root@xymontest3:/usr/lib/xymon/server/bin# ./xymoncmd ../ext/vmtest_esxi.sh
...
2
votes
1answer
40 views
How to deal with bad sectors?
Bad sectors will eventually occur, but how should I deal with them? If a bad sector occurs, does that mean that the data in that sector is irrecoverably lost, and I should restore it from backup? Is ...
-1
votes
0answers
24 views
How does disk sector reallocation work? [closed]
Does a disk reallocate a bad sector upon encountering one on read? Or does it only relocate when it writes to a bad sector? If a disk encounters a bad sector during read, does it always mean that the ...
-1
votes
1answer
61 views
Are disk partition labels or UUIDS stored in the partition area itself or in some other area of the hard disk? [duplicate]
Are disk partition labels or UUIDS stored in the partition area itself or in some other area of the hard disk?
e.g If the dd command is used is used to copy the raw partition image from one partition ...
1
vote
1answer
27 views
Recover data after lvreduce on “/”
I accidentally ran lvreduce on / instead of "/home" on a RHEL 5.9 system that unfortunately had a lot of code that was not backed up, and the system will not boot now obviously.
What is the best way ...
0
votes
1answer
108 views
How to get more I/O performance from Citrix XenServer?
I have a Citrix XenServer 6.1 installed on a HP Server (1x Intel Xeon E5630 @ 2.53GHz (4 cores, 8 threads, RAM: 752MB for dom0 and 55286MB for the guests). The server has 2 scsi mirrored disks and is ...
5
votes
2answers
112 views
HP 4TB SATA Midline in D2600 - what disk make is HP using & why WD RE4 don't work?
Does anyone know what make of disk HP are using in their 4TB SATA Midline & why WD RE4 don't work?
So we use D2600 crates with HP 2TB disks, and just buy WD2003FYYS - pop them in old HP caddies. ...
0
votes
1answer
45 views
Huge disk write speed difference between two different servers
I have two servers, with similar disks.
The first server has 4x300GB Seagate Cheetah 15K.5 model nº ST3300655SS 3.5'' RAID 10.
The second 4x300GB Seagate Savvio 15K.3 model nº ST9300653SS 2.5'' RAID ...
1
vote
3answers
64 views
mkdir: cannot create directory `b': Disk quota exceeded
When i try to create a file or dir on my Ubuntu 12.04.2 LTS
vserver i get a mkdir: cannot create directory b: Disk quota exceeded.
But:
Filesystem Size Used Avail Use% Mounted on
/dev/simfs ...
1
vote
2answers
144 views
SSD read errors; should I be worried?
An SSD just over a month old is producing read errors in my syslog whenever rsync backs it up:
[276877.360221] ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0
[276877.360226] ata1.00: ...
0
votes
0answers
37 views
Accessing the disk under Task Scheduler
I'm running a couple of console applications using task scheduler. These are applications that perform little backoffice tasks and run as C# console applications.
The applications themselves run ...
1
vote
0answers
67 views
Why does a mysql query, that requires copying to tmp table, randomly sometimes consume 100% CPU during several seconds?
I have some crazy SQL queries in my PHP scripts which badly need some optimization. However the question is NOT about how to optimize them.
These queries have a lot of "join"s and some bizarre "order ...
-1
votes
1answer
56 views
Why disk manufacturers use 1000 instead of 1024 as base unit measure? [closed]
Today is considered normal to use powers of 1000 instead of 1024(SI x base2) on disks capacity(hd, ssh, usb...), even with our operating systems using base2 measures(except Snow Leopard). This makes ...
0
votes
1answer
54 views
ram disk mirroring part of physical disk
What I would like to do/have is:
Some kind of application/driver that creates a RAM drive/partition that is actually assigned a drive letter (eg. D:). This drive letter should be based on/mirroring a ...
1
vote
0answers
73 views
Cannot initialize disk in PowerShell : Initialize-Disk throws “The disk has already been initialized”
I'm trying to change the flash drive's partition style to GPT using PowerShell, but the cmdlet throws "The disk has already been initialized" (even though I've cleaned the drive):
PS ...
1
vote
2answers
44 views
Physical disks comprising a Volume in RHEL
How do I list the physical disks and associated information (disk model, size, etc.) for all disks that are members of a physical volume in RHEL?
For example, if I do I "pvscan", I get the following ...
0
votes
1answer
31 views
3Ware 9500S - Do spare disks spin when not used
Does anybody knows if spare disks connected to a 3Ware 9500s controller will be spinning although not being used? This will wear unnecessarily the disk, possibly spinning for years before a unit gets ...
0
votes
1answer
57 views
Why can't i recover a RAID1 disk which apparently has no errors
For several years now we run a software RAID1 on a old Gentoo box with a custom Linux 2.6.31. The RAID consists of 2 harddisk with 4 partitions each. In the last years it happend about 3-4 times that ...
3
votes
2answers
204 views
PostgreSQL slow commit performance
We are having some problems with a PostgreSQL configuration. After some benchmarks I found out that very simple queries are taking a relatively long time, upon furter inspection it appears that the ...
0
votes
2answers
36 views
Are RAID 1 disks usable transparently?
I was wondering if RAID 1 disks are usable straight away, without the RAID controller. Possible?
0
votes
0answers
133 views
FreeNAS: Properly eject/unmount USB drive
What is the recommended way for removing external disks in FreeNAS 8?
I use an external drive to create an offline backup via rsync using the CLI.
Attaching a USB drive to a FreeNAS 8 server makes ...
4
votes
1answer
109 views
Strange IO issue with Ubuntu 12.04
I have a very strange IO issue with Ubuntu 12.04 and MySQL.
Currently the machine is only a replicated slave with an occasional read query hitting it. The disk utilization spikes randomly and ...
1
vote
2answers
103 views
Clear the fault LED on an IBM x3650 M4 after accidental disk insertion and removal?
The server had a disk added, and then the operator realized they put the disk in the wrong server, so they pulled it out again. No harm done, the server is running and the disk was never actually ...
11
votes
2answers
308 views
df vs du. Is my disk really full?
Strange problem...
Why i have full / partition used, but it's not really used?
Fast info:
xwing ~ # df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 16G 15G 75M 100% /
...
8
votes
4answers
465 views
root full Linux. No free blocks
df -h reports the '/' partition to be 100% full.
While running du -hs * on each directory of this partition shows there is still lot of space.
tune2efs which reports just one block to be free. Ran ...
6
votes
1answer
518 views
Why is this SSD drive failing with bad sectors, and was it predictable?
Note: this question was previously closed as off-topic. You can read the discussion. My reasons for asking it here are:
This drive is in an offline content cache server for schools in rural Zambia.
...
0
votes
1answer
192 views
MegaCLI causes drive “Other Error”
I am having an issue where running "megalci -PDList -aAll" will cause an Other Error to be logged for 2 of the 6 discs in a pair of servers I have. Here is that again in more detail.
I have two ...
1
vote
2answers
121 views
understanding disk space on ec2 freebsd instance
So I probably lack some basic fundamental understanding when it comes to unix drives.
On amazon-ec2, I just created an instance where I specified the root device to be 30 GB. If I goto volumes I see ...
-1
votes
2answers
35 views
Which is more reliable? Writing an unchanged configuration to disk or leaving existing configuration alone? [closed]
I noticed that our code is writing our configuration files to disk every time the program exits, even if the configuration has not been altered. It takes less than 0.25 seconds to write out all the ...
0
votes
1answer
32 views
Should getfacl be running constantly and is it normal for it to be using greater than 90% of available disk I/O?
I've recently been getting alerts from our server monitoring software about greater than 90% disk I/O utilisation.
I installed iotop and there are three instances of the following process showing up ...
1
vote
2answers
97 views
Failure of virtual SCSI device, Server 2012 Hyper-V - EventId 129 - Reset to device, \DeviceRaidPort0, was issued
Been running Server 2012 Hyper-V for a few months now quite reliably. That was until the following event started:
EventId 129 - Reset to device, \DeviceRaidPort0, was issued
When this occurs all ...
0
votes
2answers
169 views
Re-sizing disk partition linux/vm
I VM Player running a linux guest and I was wanting to know how do I expand the disk? In the VM player I gave more disk space but I am not sure how to mount/expand/connect the new disk space to the ...
-1
votes
2answers
160 views
SMART and exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
looking at the logs I see several errors. The smart status is PASSED, but even if It is verbose It isn't clear what is going on. Should the disk be replaced?
Attached dmesg and smart logs
# dmesg
...
0
votes
2answers
174 views
Output of /proc/diskstats in ubuntu
can anybody tell me about 11th field in /proc/diskstats?
The documentation says that it is weighted # of milliseconds spent doing I/Os. Is it like # of milliseconds spent for DiskIO in a second?
I ...
2
votes
1answer
38 views
How to dump data written to disk
Question :
How to dump data (byte-stream) written from an application to the filesystem ? (something like tcpdump but for IO/file).
Ideally it should be able to "attach" and dump the stream while it ...
0
votes
1answer
78 views
MySQL Corrupt Table - No Space left - Index File too big
I noticed that one of my servers was running out of disk space, due to heavy MySQL usage.
I stopped everything using the database, freed up some space and restarted mysqld.
Now, I checked my table ...
1
vote
1answer
332 views
Find current IOPS usage of EBS volume from my application on AWS EC2
I am relatively new to AWS and disk performance. I am trying to figure out how much provisioned IOPS does my application need to perform well.
Currently My PHP and MySQL application is hosted on EC2 ...
0
votes
2answers
36 views
Formatting a new disk partition
I just added a new raid1 volume to my Windows 2008 server.
The raid sync has just completed so I want to format it.
I got this message:
That disk will be used just for storage, no need to boot ...
0
votes
1answer
43 views
Does regularly running smartctl negatively affect disks?
I have many servers in different data centers. Lately I had some disk failures that I probably could've detected beforehand, so I started automatically running smartctl -t periodically on each disk. ...
0
votes
0answers
88 views
MySQL Extremely High Disk Activity (Read Operations)
I have 1GB Linode VPS with a standard LAMP stack. Apache is tuned fine but for some reason MySQL's disk usage is high. This is causing really slow site load times. RAM and CPU usage are fine.
Can ...
1
vote
1answer
447 views
HP Proliant ML350 G5 E200i Hard Disk get amber light after firmware Update
I have an HP ProLiant ML 350 G5 with E200i Controler running Windows Server 2008 R2 x64
It have four disks drives models DG072A9BB7 firmware HPD0, with two logical drives C: and D: booth with raid ...
1
vote
2answers
218 views
Why do I get “No space left on device” when running mail
First of all I've checked these two solutions on serverfault but I'm still having issues.
Here's my problem:
root@myserver:/# mail
/tmp: No space left on device
Firstly I checked the filesystem ...
41
votes
6answers
17k views
How can I successfully mount an 8-bit SCSI drive on a modern computer?
I have a number of internal 8-bit SCSI-1 drives that I'd like to archive for historical purposes. These are all the old NeXT Cubes and NeXTStations (monochrome and color) that were used by id ...
1
vote
3answers
54 views
Simple way to extend server disk capacities
What's the least cumbersome way to extend existing server's storage capabilities?
I have a SuperMicro custom server and a Dell PowerEdge 2950 and I would like to extend their storage with budget hard ...
2
votes
3answers
69 views
How do I determine the number of seeks performed on Linux?
I have two programs that write to my servers disk.
One I wrote, it does linear writes, it's writing data quickly. Another I'm benchmarking, it's writing data at a 3rd of the speed. It doesn't do much ...
