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

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0answers
7 views

BSOD crashes after a freeze period of 100% Highest Active Time while the Hard Disk actually appears to be idle

After a few BSoD crashes of my Windows 7 that follow a period of semi-frozen environment, I have started monitoring my Resource Monitor to try to catch the culprit in act. The symptoms are: The ...
0
votes
0answers
13 views

hp proliant microserver not detecting hard drive

So, I've hit a bit of a wall with the HP Proliant Microserver N40L. I'm trying to install a new hard drive, 4 TB, but it's not being detected by the BIOS and thus, not the OS either. It just spins up, ...
0
votes
2answers
23 views

Grow individual drive size in RAID5 array

My array is built of 3 hard drive of 2TB, I have 2 more free space and I would love to start to grow my array with 4TB hard drives, if I start to put 2 4TB hard drives and eventualy replace the 2TB ...
-4
votes
0answers
24 views

Deploying Production Linux Servers on hard drives [on hold]

When deploy Linux servers how would your partition the drivers within servers that use mySQL, LDAP, storage, etc.? Do you have a separate RAID array in RAID 1 with the Linux OS on it then have a ...
-1
votes
0answers
26 views

Frequent disk usage by kworker, jbd2

So I came across my disk access light blinking an awful lot for what should be an idle processor. The Problem There's a kworker job usually named kworker/u16:n, where n is usually 0, 1, or 2 which, ...
0
votes
1answer
26 views

Ubuntu remount a root mount that's changed to ro as rw without rebooting

Because of errors=remount-ro an underlying NFS blip caused my root mount to be remounted as read-only. I know there is nothing wrong I need to worry about. How can I remount this as rw without ...
0
votes
0answers
5 views

ddrescue - how are my chances and how could I speed it up? [closed]

I am trying to rescue data from a damaged laptop's 500 GB hard drive using ddrescue version 1.19 on Ubuntu 14.04. After an initial run of ddrescue using sudo ddrescue -n -v /dev/sda disk.img ...
1
vote
1answer
44 views

Prevent HDDs from spinning up before shutdown in Ubuntu/ZoL/SAS2008 environment

I am running Ubuntu 14.04.2 with ZFS on Linux. As I ran out of SATA ports on my Asus M5A78L-M/USB3, I bought a Dell PERC H200 card and crossflashed it to LSI 9211-8i P19 IT mode firmware to ...
-1
votes
1answer
22 views

Reuse hard-drive from ESXi 4.0 server in ESXi 5.5?

I have a server, which I would like to use in a new ESXi 5.5 server. It was used as a data store and contains VMs we would like to use on the new server. The hard-drive is SATA 3Gb which I believe ...
0
votes
0answers
21 views

How does a dedicated RAID controller performs a verify on a RAID 1 set? [closed]

Basically a RAID 1 set has an identical disk pair. Apparently the only way to verify the integrity is to read both disks, verifying readability and comparing data. Is this the case? Or? Eventually ...
1
vote
1answer
25 views

Should I be concerned by frequent RAID warning message (unexpected sense - command aborted)?

I have a Fujitsu host (PRIMERGY RX300 S6) running Windows Server 2008 R2 and Hyper-V (Version 6.1) with two virtual servers (one Windows Server 2008 R2 and one Windows Server 2012). Our 25 employees ...
0
votes
1answer
10 views

Smartmontools ouput anlysys

I am trying understand the smartmontools, when I executed the command "smartctl -a /dev/sda" It shows the part of output with heading"SMART Self-test log structure revision number 1" under which a ...
-2
votes
0answers
7 views

Result of smartctl expalaintion [closed]

I am using smartmontool(smartctl) to check the health of my ATA heard disk, I am not clear about the results the smartctl -a /dev/sdX, I am confused about, how to judge that the hard disk is failed, ...
0
votes
0answers
14 views

Acknowledging a warning in DELL OpenManage

We have a DELL R510 server where we replaced all the hard drives with new but non-certified 3TB disks. Now OpenManage throws a warning for every hard disk as "non-critical", since it recognizes the ...
1
vote
1answer
18 views

mdadm: drive replacement shows up as spare and refuses to sync

Prelude I had the following devices in my /dev/md0 RAID 6: /dev/sd[abcdef] The following drives were also present, unrelated to the RAID: /dev/sd[gh] The following drives were part of a card reader ...
1
vote
0answers
21 views

Need to add new hdd on existing ubuntu server 12.04 [closed]

I'm having Ubuntu server 12.04LTS as my local with 500GB HDD. Now I added one more 500GB with this. But, I can't able to find the new one in /media. While trying with sudo fdisk -l I got this. ...
-1
votes
2answers
34 views

how do I know if an SSD reaches its performance capability?

I was monitoring a new db server with SSD RAID-10 installed. It works fine for now but I was worrying someday it could reach its capability as the business goes on. So how can I know that before it's ...
1
vote
0answers
16 views

Partitions not recognized when installing Kubuntu 14.04 over complex RAID setup

I have three identical HDDs. Using a ROM utility, I configured the use of 90% of each of them as a RAID 5 array, and the other 10% as a RAID 0 array. That is, each array uses some area on all three ...
-7
votes
2answers
151 views

Server destroying and burning my Hard Drives [closed]

Before I start, let me inform you that I have been working as an IT Manager for large international companies for my whole life, and I have received masters degree from IT technology. I therefore ...
1
vote
0answers
21 views

how to filter sar -d disk output tidily

sar -D output-I would like a suitable command to run alongside stress -hdd but this is the output which sar -D 1 10 gives. I have filtered it using both awk |'NR > 1 {printf ...
0
votes
1answer
50 views

Unable to get SMART metrics from Seagate Disks on Debian OS

Referring to the question here, I too am trying to get all attributes out, as explained in this blog here. I am using Debian 6 as OS, and installed smartmontools version 6.3 using apt-get. My 6 disks ...
0
votes
0answers
28 views

Hyper-V Machine harddisk full, but not so

My virtual machine is having harddisk issues, at least that is what Hyper-V says. The VM has 20 gb available and is running ubuntu 14.x server. Its current usage is 4.7 GB and hyper-v pauses it time ...
1
vote
1answer
66 views

Convert RAID from Mechanical Disks to SSD?

Any issues with converting a Mechanical Disk RAID to SSD by replacing the drives one-by-one? I couldn't find anyone online who has done this, so let's make this the place to post about it. If you ...
-1
votes
1answer
46 views

How can I resume a dd operation after a “error writing in file” status?

This command produced the error mentioned above after 9 h (preparing a 2 TB hdd for encryption): time openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom \ bs=128 count=1 2>/dev/null | ...
0
votes
2answers
89 views

Dell RAID controller and 36TB storage [closed]

I've been back and forth with Dell about their RAID cards for a PowerEdge R710 server. So far half the customer service people who I spoke too said it would work, the other half said no. My question ...
0
votes
1answer
24 views

Recover data from OpenBSD softraid down to a single disk

I'm currently very desperate: I have a 3TB WD Red disk that I need to extract data from. This was part of a softraid on an OpenBSD 5.6 machine. I was in the process of migrating to a zfs on linux ...
-2
votes
0answers
14 views

Common causes of overheating cpu & hard drive? [migrated]

Wife's laptop is constantly registering higher than normal temperatures for the hard drive and cpu. The fan is working, and is constantly running. The temperatures for the hard drive and each core ...
0
votes
0answers
38 views

Rebuilding FakeRAID RAID 5 with new disk, no partitions show up, invalid PMBR

I have a RAID 5 array with 4 2TB disks on a HP Z800. One disk failed and was swapped out for a new one. I went into BIOS Intel Storage Matrix Utility and set the Array to rebuild with the new disk. ...
1
vote
2answers
58 views

Resizing Azure Primary SSD OS disk on Linux

The 29GB of primary disk coming up with Ubuntu 14.04 are not enough for our needs. Also (from what I understood), the attachable disks are not SSD. Is there an updated method of resizing the primary ...
1
vote
1answer
27 views

Finding out which cciss disk is what /dev/sdX disk (smartmontools & cciss raid controller)

I have a HP server, which has a hardware RAID array (that mostly isn't being used for raiding, the disks are just passed through to the Linux OS). I have 6 SSD disks. 2 are riad mirrored together by ...
1
vote
1answer
39 views

is it possible to move hard disks in raid 5 to pc without raid controller for accessing the information Temporarily?

I want to rebuild my array (RAID 5) for expansion. In the current configuration, I have 3x320GB hard disks giving me about 600 GB usable. I want to replace these hard disks with 3x1TB hard disks ...
0
votes
1answer
45 views

Disk I/O at limit with software raid

whenever I use rm or cp on a bigger file structure the disk i/o is going up to the top, but not with the focus on cp or rm, it is the software raid sync. My knowledge in this area is limited. The ...
0
votes
1answer
165 views

HP Server Gen9 with Gen8 Caddies/Trays

If I have an Generation 9 (Gen9) server from HP, will I be able to use the Gen8 hard disk caddies/trays? For example if I get a HP ProLiant DL180 Gen9 will the old Gen8 caddies/trays still be ...
3
votes
0answers
41 views

Why is my HDD partition a character special device?

I have a bunch of old 1T disks with an mdadm array on them. They had been out of commission for awhile, but yesterday I slotted them into a server running an up to date Debian Jessie. Eventually I ...
-1
votes
1answer
36 views

Server disk claims to be full, but appears not to be

I have no idea how this is supposed to work. I did df -h and got this result. Filesystem Size Used Avail Use% Mounted on /dev/vzfs 39G 5.8G 24M 100% / none ...
-3
votes
1answer
106 views

How many hours of SMART power on hours use should a new hard drive have?

Purchased a new HGST hard drive. Using smartctl on OS X the new drive shows 71 hours of power on hours Does this make sense or is this a sign of a refurbished drive? I can't imagine why the ...
8
votes
2answers
127 views

Are there any notable advantages (or disadvantages) to using EFI firmware and GPT boot disks in an ESXi environment?

My basic question is, as the title asks: are there any notable advantages (or disadvantages) to using EFI firmware and GPT boot disks in an ESXi environment? By "notable," I mean anything other than ...
0
votes
1answer
125 views

BTRFS, sector alignment and Advance Format Disks

I want to set up a BTRFS RAID1 setup with two WD Red 4TB disks, which possess 4K sectors. Since I am keen to get it right the first time before copying data to it (yes it will be backed up), my ...
0
votes
1answer
116 views

Dell Poweredge 2950 Hard drive size

I recently purchased a Dell Poweredge 2950 at an auction for a very low price, couldn't pass it up. It didn't come with any hard drives so I ordered 5 SATA caddy trays and I am curious what the ...
1
vote
1answer
303 views

freenas disc problems - smart error - how to repair zfs raid?

I have troubles with my freenas 9.2.1. It crashed today. Its running a fileserver on zfs jbod raid 2. I'm not sure what exactly causes the problems. The system is booting however reacting pretty slow. ...
0
votes
1answer
73 views

Ubuntu 14.04 Cloud Server - Disks gone Read Only

Disks on our cloud server with our web host went read-only this morning for no apparent reason. Following that a reboot to try and rectify the issue resulted in a non-bootable system. Our Web Host ...
0
votes
1answer
162 views

Disk Usage Analyzer on Synology

How can I get an overview of the disk usage on a Synology hard drives like this:
2
votes
3answers
176 views

What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?

I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
0
votes
0answers
76 views

IBM x3950M2 server, no drives detected during windows install

I have an IBM x3950M2 (72236MU) server that was running Server 2012. I decided to swap some drives around and reinstall from scratch with Server 2012r2. However I am unable to get the windows ...
0
votes
2answers
180 views

ESXi sees RAID1 as two hard drives

The server is Proliant ML330 G6. I've activated the embeded SATA RAID in BIOS. Created 1 logical drive in "Option Rom Configuration for Arrays" in RAID 0+1 that consists of two 1TB drives. So in other ...
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votes
2answers
47 views

Why is the BOOTMGR inside of the MBR?

According to the MBR strcuture definitions I have found, the partition table data should be within the bytes ranging from 446 to 510 of the first block of the disk. However, when I run: sudo xxd -g 1 ...
1
vote
1answer
40 views

Windows Server 2012 hide external HDD for non-admins

I am setting up a server where people connect to via Remote Desktop. It uses AD DS and uses an external HDD with a share on it for people's data. However when these people log on, aside from the ...
2
votes
2answers
161 views

HP ProLiant ML350 G6 RAID 1 disk compatibility

We are running an HP ProLiant ML350 with a RAID 1 set up on two identical 300GB 6G SAS 10K rpm SFF (2.5-inch) Dual Port Enterprise HDDs and a third acting as a "hot spare" - HP part # HPQ-507127-S21. ...
1
vote
2answers
982 views

When reading SSD drive specs, what's the difference between MB/s and IOPS?

I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...
2
votes
1answer
58 views

“failed command: WRITE DMA” but SMART test says hard disk is OK

Recently I started receiving (in dmesg) such errors: [ 1569.944985] ata6.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 [ 1569.944991] ata6.01: BMDMA stat 0x44 [ 1569.944994] ata6.01: failed ...