Questions about hard disks' performance, issues, tips, and software.
0
votes
0answers
130 views
JBD: Spotted dirty metadata buffer
Sep 25 22:19:38 host kernel: [7798806.146942] JBD: Spotted dirty metadata buffer (dev = loop0, blocknr = 267). There's a risk of filesystem corruption in case of system crash.
Sep 25 22:19:38 host ...
20
votes
4answers
986 views
Do raid controllers syncronize HDD platter rotation?
I'm in the market for a new storage solution. While researching various specs one of my coworkers said that some raid controllers can synchronize HDD rotation to the effect of all drives' sector/block ...
0
votes
0answers
42 views
Ideal RAID config for max redundancy [duplicate]
Possible Duplicate:
What are the different widely used RAID levels and when should I consider them?
I was just handed a Dell r720 with 12 900GB drives which I need to configure for maximum ...
0
votes
0answers
149 views
Windows Clustering: Drive resources not showing up on inactive node
I have a Production and a QA Windows 2003 R2 sp2 cluster setup with two hosts assigned to each. On the QA cluster, the inactive node shows the disk drive letters in My Computer, but the production ...
0
votes
1answer
672 views
Creating Persistent Drive Labels With UDEV Using /dev/disk/by-path
I have a new BackBlaze Pod (BackBlaze Pod 2.0).
It has 45 3TB drives and they when I first set it up they were labeled /dev/sda through /dev/sdz and /dev/sdaa through /dev/sdas.
I used mdadm to ...
1
vote
1answer
443 views
Linux Software RAID: How to fsck on hard drive?
We have a Linux server running with Software RAID1. We see some issues in /var/log/messages like: unreadable sector. I want to perform a complete fsck on the drive to get some more information, but a ...
2
votes
1answer
158 views
Solaris 10: Drop disk cache? (to benchmark app)
Is there a command to drop the ZFS and UFS disk caches? (Preferably just one folder hierarchy.)
I'm trying to tuning the performance settings of an application that read/writes data from a large ...
0
votes
1answer
109 views
RAID5 and different sizes of HDDs
Today I set up my first RAID ever. I decided to use RAID5, because I want as much space as possible, but I'm to afraid to use RAID0 because of possible data loss.
I have 4 0,5TB drives and in RAID5 I ...
2
votes
1answer
77 views
Upgrading HP DL185 G5 8LFF, is using a Dell J1520 4-Drop SATA Adapter possible?
The HP DL185 G5 8LFF model supports 8 3.5" drives and 1 optical drive. However, instead of the optical drive, I'd like to have 2x 2.5" drives instead. The problem is that the PSU has no more SATA ...
0
votes
1answer
124 views
Windows Server 2008 R2 missing a drive
I have a production server (Dell T110 Windows 2008 R2) that was up and running just fine. It has 4 drives 2 256GB drives a spare, and the OS, a 512 that is setup for MSSQL2008R2 Server Data drive just ...
-4
votes
1answer
56 views
server hard drive space monitoring [closed]
looking for a freeware program to monitor my hard drive space.
Then send me an email when it goes below a certian % i have not been able to find any freeware on google so far so any help would be ...
1
vote
1answer
168 views
Must partprobe before using drive?
This is a followup question to Cannot mount /dev/sdc1 on Debian 5.0, special device /dev/sdc1 doesn't exist
Basically, I have 6 SATA hard drives in a machine and I'm trying to create a RAID6 ...
2
votes
0answers
168 views
Are there Thunderbolt drive enclosures? [closed]
The only Thunderbolt hard-drive adapter that I've found so far is part of the Seagate GoFlex system.
I am surprised no one seems to offer drive enclosures with Thunderbolt yet.
At issue here is fast ...
1
vote
1answer
479 views
How to clear the bad sectors from harddisk? [closed]
I am using debain 6 in my system, Recently the dekstop frequently hangs. So, when i look on the harddisk health i have find a lot of bad sector. So, can anyone say to remove the bad sector of harddisk ...
11
votes
5answers
502 views
Is it bad to have a very full hard drive on a high traffic database server?
Running an Ubuntu server with MySQL for a high traffic production database server. Nothing else is running on the machine except the MySQL instance.
We store daily database backups on the DB server, ...
3
votes
2answers
96 views
LOCK/Password Protect home partition
I have access to a server with SSH and for some reason I want to LOCK/Password protect or encrypt the home partition.
Its very important for me to do it in the best possible way, I don't want anyone ...
0
votes
1answer
362 views
Ext4 self errors after some time on CentOS 5.8 64-bit
I get such warnings in dmesg:
EXT4-fs error (device md2): mb_free_blocks: double-free of inode 0's block 602619328(bit 15808 in group
EXT4-fs error (device md2): mb_free_blocks: double-free of inode ...
1
vote
2answers
701 views
Very high load, apparently caused by pdflush
I have a server that's running CentOS 5, and it will periodically (a couple of times a day) have enormous spikes in load, and the whole server will grind to a halt. After a couple of minutes, the load ...
0
votes
2answers
347 views
RAID disk failure - Replace disk or whole array?
I have a 5 disk Raid5 array of Western Digital Green (WD10EADS) 1TB. Raid5 is via Windows Server (software raid).
One disk has failed, and it looks as though I can't get the same model replacement. ...
4
votes
1answer
197 views
How to recreate a RAID 10 array with mdadm
So our virtual machine has broken (it's actually a Linux machine in Azure) on which we were running a RAID10 array of 4 disks. It's an ubuntu box. From what I can tell the four data disks are fine, ...
0
votes
1answer
378 views
Where is my new hard disk Citrix Xen Center
I'm trying to create a new storage repository on a server that already has 2 old hard disks, set up with hardware RAID 1. It's my first time doing this in Xen Server environment so I wanna be extra ...
0
votes
0answers
170 views
Backup HDD data using SystemRescueCd
Today my V-Server stuck on the boot, the datacenter told me that there is a ton of problems with the system, and they can't fix the problem, I need to backup my data and re-install a fresh system.
OS ...
0
votes
1answer
325 views
ESXi Second hard drive empty after failure ? or is it?
I had an esxi server installed on a 500GB drive. the system also had a 2TB drive. I had put vm's on both drives. The 500GB drive has failed. When i attempt to connect the 2TB SATA drive to either ...
2
votes
2answers
148 views
Hard drive preventive maintenance
I have a couple of servers (HP ProLiant DL380, DL360 and DL120), which are all set up with hot spares, as well as a couple of regular workstations with some external disks.
I want to create ...
3
votes
1answer
384 views
Is there way to read sectors from SATA drive without ECC correction?
I know, there was such possibility like that in old ATA standards: "READ LONG" command produced LBA sector + ECC payload. sg_read_long supports in in linux, but the command is obsolete for quite a ...
0
votes
1answer
221 views
Hotplug area too small error
I have VM running under RHEL6, which is running under HyperV. It has a lot of important soft installed, but does not have suffocating workload (~10% CPU is used). It's been really unstable recently ...
4
votes
1answer
2k views
Does Dell Permit 3rd Party Hard Drives on Perc 6/i?
I have various Dell servers (all 2950's) I would like to put some SSDs in. I have spoken to Dell on the phone and asked for a quote for 128GB SSDs for 2950's, they told me they don't sell them for ...
1
vote
3answers
357 views
Using `dd` command to test performance on different partitions
I'm trying to setup a web application on the Azure Preview Portal. I've created a Linux Centos 6.2 machine from the Azure VM gallery and attached some disks to it.
df -h gives me this:
Filesystem ...
8
votes
1answer
272 views
Recover data from SCSI hard disk
We've got an old server with SCSI hard disk. The server crashed last week and it isn't exactly known what hardware component is damaged. Since the server is due to be retired anyway we don't want to ...
1
vote
2answers
86 views
Database Server Can't Find 300GB
I have a Windows Server 2008 R2 running Microsoft SQL Server 2008 R2. I have some how lost 300 GB of disk space, and I can't seem to find it anywhere. The Hard Drive is 500GB and I can only account ...
1
vote
1answer
399 views
Are intermittently slow disk read speeds ever caused by the OS itself?
I'm noticing intermittently slow disk read/write speeds on my CenTOS 5.x VM.
Sometimes hdparm will report:
/dev/sda3:
Timing buffered disk reads: 6 MB in 3.03 seconds = 2.04 MB/sec
Other ...
0
votes
1answer
156 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 ...
-4
votes
2answers
212 views
RAID 3 Write Penalty
I'm wondering what the write penalty is for RAID 3?
I know for 5 it is 4, and 6 is 6, but I'm not entirely sure how it would work for RAID3.
The thing that confuses me a little with raid 3 is the ...
5
votes
3answers
3k views
What do these disk errors in syslog mean?
I just rebooted my monitoring server for the first time in a while, and the following starting filling the screen:
Jul 11 23:52:30 monit kernel: [ 25.255908] ata1.00: exception Emask 0x0 SAct 0x0 ...
0
votes
1answer
342 views
How to resize two RAID-1 partitions?
I have an Ubuntu 12.04 server with two 3TB disks and Software-RAID 1. Currently they are partitioned as follows:
# discus
Mount Total Used Avail Prcnt Graph
/ ...
1
vote
1answer
175 views
SUSE VM looking for wrong partition Ids
I've got a SUSE instance running on a Hyper-V (Win Server 2008 R2) host.
Initial install was fine. After setting up Apache, MySQL, etc... I shut down the VM and snapshotted it (So I could revert if ...
2
votes
1answer
435 views
Cannot extend existing data disk over 2TB on windows 2008 with dynamic and gpt part
As my D: disk is almost full (2TB) I extended the FC lun to 2.5TB.
The new 500Go are seen by windows as "Unalloacted" as expected.
I tried to extend the volume but windows says
There is not enough ...
0
votes
1answer
153 views
Reduce vibration by suspension?
We have a location near a railroad line and when trains go by the vibration seems substantial enough to possibly cause (or explain) harddrive damage.
I wonder if suspending a machine or hanging it ...
3
votes
1answer
93 views
Uneven utilization of disks in xfs-formatted logical volume
We have a backup server with 66TB of available space, set up like so:
12 6TB RAID10 arrays -> 12 PVs -> 1 VG -> 1 LV -> xfs
This filesystem is used exclusively for backups (through BackupPC). It ...
-2
votes
1answer
301 views
How to effectively partition a new server?
I'm a developer but I've been assigned to a new project were it seems I'll have to wear the IT hat too.
Company bought a new server were we'll be running an application which basically "translates" ...
3
votes
4answers
1k 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.
1
vote
3answers
282 views
Extremely High Hard Disk Reading Usage
My VPS configuration is as follows:
H.D.D = 25GB
RAM = 256MB
OS : CentOS 5.5
I received an email from server provider showing that my VPS H.D.D read usage is 137GB in one day. I have installed ...
2
votes
1answer
797 views
Adding Extra Hard Drives Debian Fdisk
well I just got a new server and it's a little different than what I'm use to, when I run cfdisk I get
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. ...
2
votes
3answers
590 views
How to reduce the SATA link speed of drive in CentOS?
How do I make CentOS run SATA drives at 3Gb/s at boot?
Background:
I'm having an issue with a motherboard that claims to support 6Gb/s SATA transfer speeds, but when using 4 drives on it, in a ...
0
votes
1answer
211 views
How does RHEL alert a user about the failure of a hard drive in a RAID configuration?
I have, for better or worse, been put in charge of a big-ass server running RHEL6. It has six 1.5 TB drives in a RAID5 configuration. I understand the theoretical concepts behind RAID, and I access ...
0
votes
3answers
642 views
How to change mount point for /home
I am using CentOS 5.8 x64bit
I have all my users directories in the /home/ directory, the drive which CentOS is installed along with /home is on
/dev/mapper/VolGroup01-LogVol00
And its getting ...
1
vote
2answers
2k views
Why am I getting “Input/output error during read on /dev/sda” during a CentOS text-mode installation?
I'm trying to install CentOS 5.7 on an HP Proliant DL380 G5 (with an HP P400 Smart Array RAID controller) and am getting the following error during the text mode installer:
ERROR: pdc: reading ...
2
votes
1answer
377 views
AMI AWS No space left on device
I have a small AMI instance on AWS. The docs say that I should have 160G. I cannot download anything to the server as I get the following error:
write error: No space left on deviceMiB | 276 KiB/s
...
3
votes
3answers
136 views
What's a worthwhile test for a new HD?
I work for a company that uses standard 2.5" SATA HD's in our product. We presently test them by running the Linux 'badblocks -w' command on them when we get them - but they are 160 gig drives, so ...
2
votes
3answers
548 views
Diagnosing high CPU waiting
I have a monitoring server that is running icinga/collectd/graphite with about 50 hosts. I have noticed high load/slugging performance on the box. If you take a look at top, you'll see:
Cpu(s): ...
