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

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0
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1answer
54 views

DB2-Express-C and Postgresql using raw harddrive as datastore

I have a system running Solaris with 2 harddrives. One holding the OS and the other unpartitioned. I was thinking about using the second as database space. My question is, if it is possible to let ...
0
votes
1answer
70 views

KVM Image Jammed After Power Unplug

We have a HP DL380 Server which has ubuntu 12.04 OS as Host and for Virtualization KVM. Power of our server unplugged suddenly and after plugging power size of image of vm in ...
0
votes
1answer
86 views

How can I monitor if an external USB drive gets disconneted from a server?

I have a few servers that rely on external USB drives for some of their backup scripts. However, there have been times when the USB drive might get disconnected accidentally (upon reboot or power ...
0
votes
1answer
568 views

CentOS 5: is %wa too high or optimal?

i have question about waiting for HDD. I'm not sure what is optimal %wa. Server running browser game, i know that there is a lot hdd writing but im not sure what is optimal %wa. Server running 8 ...
0
votes
1answer
1k views

3ware 9500S-4LP - Replacing faulty drive

An old Windows 2003 server is running on a 4 disks (each250GB) RAID 5 array, attached to a 3Ware 9500S-4LP unit. This morning I got two alarms from the controller: - 0x04:0x0025 Cache flush failed; ...
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4answers
183 views

How to move the MySQL datadir with minimal downtime?

Let's say I have partition sda2 mounted on /var and it's almost full. I have a second disk sdb whose partition sdb1 I want to mount as /var. Now since a running service (mysql) is using /var all the ...
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3answers
197 views

Can I remove and test hard drive from Raid5 controller without rebuilding?

I have a new PowerEdge T320: Intel Xeon E5-1410 @ 2.8 GHz 16GB Windows Server 2008 r2 configured as Domain Controller Dell PERC S110 Software Raid 4x 7200 rpm 1TB drives configured in Raid5 I have ...
1
vote
1answer
50 views

Is there any sense to repurpose old hdds to maximise lifetime?

I have some 1TB SATA drives that are used for light online data (non-boot) but they are getting old. I though that by repurposing them to be archive drives, they might last longer. Any ideas, or ...
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2answers
143 views

The device, \Device\Harddisk4\DR37, has a bad block

I've received the error below and wondering if it's something I should be worried about? I've checked the RAID controller and all are functioning without errors. Log Name: System Source: ...
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votes
1answer
64 views

S.M.A.R.T does not want to run

How do I run S.M.A.R.T on a server with 2 hard drives in RAID1? I tried: smartctl -i -d /dev/sda smartctl -i -d /dev/sdb smartctl -i -d /dev/md1 but get this error: smartctl 5.40 2010-07-12 r3124 ...
0
votes
1answer
159 views

Hard drives fail, filesystem goes into read-only mode

2 days ago I got a warning message that: A DegradedArray event had been detected on md device /dev/md1. I contacted my data center and asked them to change the hard drive. They told me that ...
0
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2answers
219 views

Will adding RAM improve web server disks read performance?

I'm wondering if in case of linux based web server, serving the same static files over and over again, adding RAM will improve read performance? It should probably add to size of page cache, and ...
2
votes
2answers
531 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 ...
3
votes
2answers
2k views

DegradedArray event on /dev/md1

This morning I got this message: This is an automatically generated mail message from mdadm running on A DegradedArray event had been detected on md device /dev/md1. Faithfully yours, etc. P.S. ...
1
vote
2answers
193 views

Writing directly to a VirtualBox disk

I have a need to write to a VirtualBox guest's harddrive after a snapshot is taken (I cannot modify the original backing file (VDI, dd, whatever). I was hoping there was some way in VBox to modify ...
-2
votes
1answer
65 views

Linux Server HDD Corrupted

Today I put my forum offline just before scheduled Cpanel backup. An hour later when I checked it says DATABASE error occured(or whatever the database error was) I logged into SSH and perform reboot. ...
-1
votes
1answer
64 views

smartctl -A Missing Attributes

I'm reviewing SMART attribute data for different disks and notice that some disks report the following attributes while other disks don't: 241 0xF1 Total LBAs Written 242 0xF2 Total LBAs ...
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2answers
135 views

Ubuntu Server crashes on file transfers

Upon transferring some files across server disks I lost connection and the server crashed. Plugging in a Screen showed no response at all. I had to reset the Server, which then boots normally. At ...
0
votes
1answer
1k views

Maximum Disk Space Dell PowerEdge 2900 [closed]

What is the maximum disk space I can have for my Dell PowerEdge 2900. I know that the max for the OS partition is 2TB unless you do some special setup but for other volumes what is the max that I can ...
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votes
1answer
116 views

Both hard disk fault at same time [closed]

Today one of the my computers have strange log. At 8:00 both hard disks start to have errors like this: Feb 9 07:24:48 bill2 kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) ...
0
votes
1answer
212 views

RAID 1 Failure - Unable to boot to single drive

This is sort of baffling me. A computer we manage had a series of failures causing one of the hard drives (SATA Port 0) to fail. The drive still recognizes that there is an OS on it but fails to boot ...
3
votes
3answers
5k views

Forcing a verbose fsck on reboot (Ubuntu)

I'd like to force a verbose fsck on reboot of my Ubuntu linux server, I can get fsck to run on reboot by creating a file /forcefsck in my root dir ... Additionally, by adding a y into the contents of ...
2
votes
2answers
271 views

Disk Monitoring with cronjobs — report disk issues

Is there a way to monitor disk health and send cronjob reports for errors? I know you can use smartctl -s on -a /dev/hda to pull information but just wondering if there is a way that could be used to ...
1
vote
2answers
103 views

Could resizing a partition break the filesystem? [duplicate]

Possible Duplicate: Kernel Errors Present: EXT4-fs I resized a partition (using Gparted live cd), and it went fine. A day later I've started to get EXT errors. Could these two events be ...
0
votes
1answer
3k views

High load and iowait on MySQL database server leads to slow MySQL INSERTS

I have a MySQL database server runnuing on Ubuntu 12.10 with 64GB RAM, 2x3 TB SATA 6 Gb/s HDD 7200 rpm and software RAID 1 and an Intel Core i7-3930K. The database server is accessed over a local ...
0
votes
2answers
131 views

Fast format option for HDs recommended in dedicated servers?

I'm learning about dedicated servers and have a very simple question. In windows server 2008, is it a good practice to fast format your HDs for the first time? Or should i perform a slow one? Which ...
1
vote
0answers
424 views

SSD Performance under Oracle

I have serious performance issues with oracle running over ssd. I have two OCZ Vertex 3 MAX IOPS drives (firmware 2.15). It runs on a INTEL C600 SATA Chipset. Windows 2008 R2. So the issue is ...
0
votes
1answer
40 views

Is there a hook that I can use to detect if one of my hard drive partitions on my server is full?

I have a server with a partition that contains all the uploaded files from my users... It gets empty after the files received are send to the CDN. Everything works. But I am worried that one day the ...
0
votes
2answers
449 views

smartctl reports Current Pending Sectors as 2, but a long test doesn't find any errors

The SMART attributes on the drive are: SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH ...
1
vote
2answers
431 views

100% - /tmp help needed

few hours back i receievd message from directadmin Warning: The disk usage for one or more of your partitions is running low so i checked in directadmin and noticed this message Subject: Warning: ...
2
votes
2answers
232 views

What is the likelihood of data loss in a failed SSD vs HDD?

It is well documented on Wikipedia that a head crash in a hard disk drive (HDD) may result in some data loss. However, there is not much being written about the different modes of a solid state drive ...
1
vote
1answer
396 views

Failing disks in RAID array - strategy suggestions required

I have a linux based software RAID 5 array. SMART has just started to send me emails complaining that one of the 5 disks has a Current Pending Sector Count of 9 and also an Offline Uncorrectable Count ...
41
votes
6answers
18k 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 ...
0
votes
1answer
164 views

Windows 2003 Near Freezing

Problem: Our server becomes very very slow (near freezing) if I copy a file from any directory on C: and D: to any other directory. In short It becomes very slow if I touch the hard disk. Currently I ...
2
votes
1answer
308 views

Recover ext3 files from hard disk with bad sector

I have a folder of about 5GB that suddenly disappeared. When I checked its hard disk, I found out it has bad sector for about 2-3MB on this folder. Maybe it is on the folder's pointer. The partition ...
3
votes
1answer
451 views

RAID-5 or RAID-6 - is RAID-5 really that bad? [duplicate]

Possible Duplicate: Which is better: RAID5 + 1 Hotspare / RAID6? I need to decide myself between RAID5 and RAID6. The servers have a hardware-RAID controller and 6 drives each. The ...
0
votes
3answers
378 views

How can I prevent silent corruption on a dying hard drive? [closed]

With a drying drive (that has more and more bad sectors), on an ext4-journaled partition, a cp operation will sometimes complete without error, but the written data will either be wrong, or just won't ...
0
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3answers
152 views

mysql crashs. bad hard drive or hardware

ive seen highloads and mysql crash 2 times in 1 week now. could this be the cause any idea? Jan 3 09:49:19 HOST kernel: [2272100.568769] res 51/40:38:78:7f:f1/40:00:35:00:00/e0 Emask ...
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votes
1answer
185 views

Mounting local external hard drive on a remote machine [closed]

I have an external hard drive, which stores extremely large files. This is LOCAL and is connected to my laptop/desktop. I run many different programs on a REMOTE Linux server. I need to use some of ...
1
vote
4answers
377 views

Upgrading hard drive on exchange server

I have a Windows SBS (2003 R2) which is currently running Exchange 2003. It's now beginning to max out it's 25GB HDD and I have been given the job of upgrading it to a larger one (lucky me...). Since ...
3
votes
1answer
777 views

what's the purpose of SMART's captive test?

When testing hard disk with SMART (for instance using smartctl tool) I can do tests (for instance long test) in two modes: captive (also called foreground mode) or non captive. Non captive mode is ...
0
votes
1answer
246 views

Linux RAID10 hit bad disk while re-syncing. Is it hosed?

I have a Linux software RAID10 device on md0. It's made up of 4 1TB disks sd[abcd]. Yesterday Smart emailed me to say a disk was going bad (seek errors going up and reallocated sectors). I rebooted ...
0
votes
2answers
332 views

Accessing data on SAS drives if server fails

If my server goes down, how can i access the data on the SAS drives? I don't have another server to plug them into, and even then connecting the drive to a different controller (while keeping the ...
-4
votes
2answers
160 views

Would data recovery be possible after Acer hidden partition reinstall? [closed]

Someone did a re-installation of his Operating System of the C: drive using his computer's 'Acer hidden recovery partition' (the alt+f10 procedure). Then he chose 'do not back up personal data (this ...
3
votes
1answer
3k views

Why does storage's performance change at various queue depths?

I'm in the market for a storage upgrade for our servers. I'm looking at benchmarks of various PCIe SSD devices and in comparisons I see that IOPS change at various queue depths. How can that be and ...
17
votes
1answer
2k views

Why does unpartitioned Hitachi HDS5C3020 drive start consuming 50% more power 15 minutes after boot?

In a Debian 6.0.6 system there are 74 pieces of 2TB Toshiba DT01ABA200 drives. These drives are identified as Hitachi HDS5C3020BLE630 drives running firmware revision MZ4OAAB0. 64 Drives attached via ...
2
votes
2answers
2k views

How to change hard disk array on HP Proliant ML 350?

We have a hd damage and we need to replace this hd, How to change and add more hd to array to HP Proliant ML 350 G5 server ?
3
votes
1answer
2k views

Smart Array P400i Physical Drive failed after being replaced

We have replaced the bad drives in a few HP systems (ProLiant DL360 G5), but they continue to show failed. The drives are part of RAID, and I think this might be why they are appearing as failed. The ...
3
votes
1answer
981 views

Rebuilding RAID 10 array with two failed drives

I have dedicated server with 4 HDD in hardware RAID 10 configuration and It worked fine until yesterday, when It started to crash randomly on couple minutes. I’ve contacted my data center and they’ve ...
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2answers
340 views

How do I copy files between harddrives on Ubuntu CLI? [closed]

I have a dedicated server with a 120gb main ssd. The server happens to come with a couple of 3000GB hard drives. I'd like to use them to back up my main drive. Preferably, I'd like one as an exact ...