Storage Hardware





Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

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What is best way to monitor the Hyper V Disk performance ?

My Hyper V servers are connected with 10 gb SFP connector with SAN and I would like to see if there is any bottleneck.

Attached is the current performance.
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Announcing the Winners!

The results are in for the 15th Annual Expert Awards! Congratulations to the winners, and thank you to everyone who participated in the nominations. We are so grateful for the valuable contributions experts make on a daily basis. Click to read more about this year’s recipients!

We had an incident occur where power was yanked from our NIM LPAR. This along with what I believe to be age damaged some hardware. We purchased a exact duplicate cabinet and installed the hard drives on a hope of restore this system. The cabinet powers up and we can reach HMC however we do not see any hardware information. We have tried rebuilding from the command. We have also tried adding machines hoping to add the servers it hosts with no luck. Are there any further options or are we just sunk?
Hello, i have added an additional Seagate 6TB drive (ST6000VX001) to a FUJITSU Server PRIMERGY TX1310 M3 running Windows 10, which has quite a straightforward  plug and play for hard drive upgrade.

After inserting the hard drive I get the option to initialize the disk from Disk Managmenet
However, it cannot be initialised due to "I/O device error".
it is however detected running Sea Tools diagnostics in Windows and passing ShortDST-Pass
The new disk is not detected at all though when starting up BIOS-mode, I first tried to make sure the drive is really properly seated with no difference, and then I switched disk places so I inserted the  new disk in a slot that previously was occupied by working hard drive, and this hard drive to the first slot. This had the effect that the other hard drive worked just fine in the new slot, and the new hard drive still did not work so it seems we can rule out problems with slot/disk not properly seated.

I think I once saw a BIOS startup message like "Problems fixed disk" or such, does thus sounds like a hardware disk issue or recognized as something else?
HP powered offHP DL380ESXiHi,

 I have HP Proliand DL380 G5 Server with 5 hard drives in RAID 5 running VMWare ESXi V5.1.
 It has been running fine all these years (about 10 years in production).
 But last Thursday, it shut itself off during the day. When I visited onsite, I saw power light in sold amber color. I turned it on and it loaded OS just fine and all virtual machines were back online.
 I discovered that it shut itself off again on Friday night (approximately 18 hours after its first shutdown).
 When I went onsite this afternoon, the power light was in solid amber color again. I turned it back on and all VMs started ok.
 If this was Windows server, I can check System Log in Event Viewer to determine if there were some type of hardware failure.
 But I am not familiar with ESXi Event log system - how to access it.
 What do you suggest I start? It has shut itself down twice in two days and I feel that it may go down again tomorrow unless I address the problem.

 It has redundant power supply and I confirmed that both PS units in solid greens from the back of the rack server.
 RAID is in working order because all 5 hard drive light were blinking in green.

 Can you help?
I have suffered a second hard drive failure with the second's symptoms closely resembling those of the first failure. The second occurring a mere 3 weeks after installing a brand new replacement drive.  Seagate 4TB Barracudas both.
Hardware ECC Recovered = 1
Anyone else having issues with Seagate HDDs?  The computers on day 1 will have terrible performance ups and downs.  File corruption and random errors running any program.  Working with Dell to get to the bottom of this, we found that the Hardware ECC recovered current will at 1 while the performance issues exist, and rise to 40-60 when working normally.  Upon cloning to another brand of HDD and running CHKDSK, it will result in a proper working system with no performance problems.  We have been studying this for months, and have seen this in 100% of Seagate drives installed since April 2019.

I have a VMware vSphere 6 Hypervisor Licensed for 1 physical CPUs (unlimited cores per CPU) installation running on a physical Lenovo server and with one virtual server. I'd like to back this up to an external hard drive. What is the best way to do this without having to buy 3rd party software?

776 (Ready for Recovery) Logical Drive 1 (1.4 TB, RAID 5) is queued for rebuilding. hp server g5 ml350 server has been in this state for 2 weeks server has been restarted still says ready to rebuild not sure where to look next thanks
Hey there

Specing out a new T640, small environment, single host for a client, always use 15k drives, 300s for esxi mirroed, RAID 5 900GB SAS, global hotspare.
The engineer from Dell was strongly suggesting going with Intel SATA SSDs vs SAS 15k drives.
Over 5 years ago, had an EMC SAN and was going through SSDs constantly - so I was curious to know what the experience is of other people.

Here is what he provided me with - what do you guys think?
"Here is the datasheet for the S4610 960gb SATA Mix Use SSD. Mean Time Between Failure (MTBF) is listed as 2,000,000 hours which is a little more than 231 years. Performance is listed as 51,000 Write IOPS and 96,000 Read IOPS. Lifetime writes are listed as 6PBW (Petabytes Written) which works out to writing about 3.25TB/day every day for 5 years PER DRIVE.


By comparison a 15k SAS drive can reasonably expect about 200 IOPS (not 200,000 but 200). Failure rate info is hard to find but I found an older Dell document listing as 1,200,000 hours (which really seems pretty high but it was the only number I found and is still 60% of the SSD number).Since SSDs have no moving parts (the solid part of solid state drive) they are much less likely to fail and in this case are roughly 255x FASTER at writing and 455x faster at reading data.  

Thanks guys!
Who can recommend a NAS with the smallest space footprint?
There is a need to install this in a space which is small.
Many thanks,
PMI ACP® Project Management
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PMI ACP® Project Management

Prepare for the PMI Agile Certified Practitioner (PMI-ACP)® exam, which formally recognizes your knowledge of agile principles and your skill with agile techniques.


I found the script on githib that has helped me extract CCTV footage from a Dahua CCTV recorder hard drive but it fails after extracting 31.5GB of data and I need to extract 2TB.

This is the first time I have installed Python and run a Python script.

The Script is

''' Python 3.7  for Dahua  by Dmytro Moisiuk '''
'''Script for recovering video from DVR Dahua DHI-HCVR4104HS-S2 
The following parameters should be changes at the end of the script:
f- image for analysis; 
blocksize-block size for analysis; 
quality - determine by byte with offset 0x1D in the integer from the beginning of the signature 0x44484156FD;
For all quality video use 'all' without quotation marks;

import os
import sys
import hashlib
import re
import binascii

def Time_conv(Time):
    Time_List = ['Time']
    c = int(Time_List[1][4],16)
    d = int(Time_List[1][5],16)
    b = int(Time_List[1][3],16)
    a = int(Time_List[1][2],16)
    d = int(Time_List[1][5],16)
    e = int(Time_List[1][6], 16)
    f = int(Time_List[1][7], 16)
    g = int(Time_List[1][8], 16)
    h = int(Time_List[1][9], 16)
    #b = int(b,16)
    if (((c % 4)*8 + d // 2))<10:
        dd = '0'+str(((c % 4)*8 + d // 2))
        dd = str(((c % 4)*8 + d // 2))
    if ((b % 4)*4+c//4)<10:
        mm = '0'+str((b % 4)*4+c//4)
        mm = str((b % 4)*4+c//4)
    if ((a*4) + b//4) < 10:
        yy = '0' + str((a*4) + b//4)
        yy = str((a*4)

Open in new window

Vcenter Operations Manager. Showing two old faults from February 2018. ESX host has 0 days of usable disk space allocation capacity remaining. Host is over VM capacity by 0 vms because of disk space allocation.

I see no disk space issues anywhere. help with understanding and resetting this flag?
I have a hard drive that has been formatted by mistke and need to recover data. I am able to run a scan using EaseUS Data Recovery. I can see the entire folder structure, etc but no files. I have since been informed that the drive was encrypted using Symantec Endpoint Encryption. Is this the reason no files are visible? Would have assumed if it was encrypted I would not be able to see folder structure, etc?

I would like to know how to unencrypte the drive so i can run another scan to see if I can recover this data. Any help is appreciated. Let me know if you need any additional information.
RAID StatusHi,
I have DELL PowerEdge T320 Server with three 600GB SAS HDs. First two HDs are in RAID 1 and third HD is a hot spare.
Current light status is as follows:
1st hard drive (Physical Disk 0): Foreign (toggling between green and amber)
2nd hard drive (Physical Disk 1): Failed (blinking amber)
3rd hard drive (Physical Disk 2): Online (blinking & solid green)

I understand that 2nd hard drive is shot and needs be replaced.
But what does "Foreign" mean in 1st hard drive?
Is it fair to say that only 3rd hard drive is keep the system going at this point or 1st hard drive and 3rd hard drive is being mirrored?
Hi all

I hope someone can help as I'm waiting on QNAP support but no reply yet.

We have a QNAP with iSCSI connection hosting some VM for hyper V. The QNAP lost power when a cleaner pulled the plug and when coming back on line the iSCSI can connect in Windows but no drive is shown. The QNAP shows the LUN in error as shown here QNAP LUN Error.

I've tried to follow this article using Winscp but the LUn never comes enabled.

The iscsi_trgt.conf file output is here and as you can see below.
targetIQNPrefix =
bServiceEnable = TRUE
servicePort = 3260
initiatorBitmap00 = 00000001
log = TRUE
logFlags = 1
bSupportMultiACL = 1
targetBitmap00 = 00000006
LUNBitmap00 = 00000003

initiatorIndex = 0
initiatorIQN =
initiatorAlias = Default Policy
initiatorTargetBitmap00 = 00000006
initiatorLUNBitmap00 = 00000003

[InitiatorKey] = 0

[TargetKey] = 1 = 2

LUN_SMAS_0 = 0
LUN_backup_0 = 1

LUNIndex = 0
LUNName = SMAS_0
LUNMetaPath = /share/CACHEDEV1_DATA/.@iscsi.img/iSCSI-SMAS_0-5c933bba:001
LUNSectorSize = 512
LUNCapacity = …

There is a Disconnected Network Drive (K) in our server 2012 R2 TS server.

Note: We removed this drive previously.  When i double click the drive it start showing share folders but I want to remove this drive.

I tried everything but its not removed. I delete the registry key "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2" and other things.

Server is not domain joined. Its a standalone work group server. These disconnected Network Drive is appear on all users. Please review the below images. Its VM.

snap nas drive is asking for credential when user try to access shares. cause. how to change. impacting company wide. please help me asap.
I would like to ask about the HDD which are currently will be use as external drive and in the future will used to NAS.
I saw that some HDDs has the spec : for nas 8-16 NAS storage and some other HDDs for nas 1-16 NAS storage ( this is coming from their description)

I don't understand what is the different?
Can i use  a hdd  which is build for NAS 8-16 with only 4 bay nas ?
what else is mean?
Can anyone suggest an exact model of raid controller card (along with web purchasing link) that I do not have to reflash and is ready to use with my HP z800 workstation/server:

It needs to:

be compatible with vmware ESXi 6.7?
support at least 4 sata/sas drives with 6.0Gb/s transfer speeds
meet my budget of 200$ or lower

I am looking to use sata drives with the controller card to configure 2 or 3 - 2 TB drives in a raid configuration - considering this drive potentially:

However i am not sure on which raid level to choose - i know it will have to be raid 1 or 5 but am not sure which one to choose. I would like the option to potentially start with 2 or 3 - 2 TB drives in some raid configuration but then add more disks as i could afford them. What raid level number would be best to achieve this functionality? Or is adding drives after the raid is built not even an option with raid?

Thank you for all your time and effort to answer my questions. I really appreciate it!
Exploring ASP.NET Core: Fundamentals
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Exploring ASP.NET Core: Fundamentals

Learn to build web apps and services, IoT apps, and mobile backends by covering the fundamentals of ASP.NET Core and  exploring the core foundations for app libraries.

only the OS drive is mounting, not the secondary drive during file restore process for our 2012r2 server... why?  This is an Azure VM

I have a Drobo (5D) with a drive that's about to go bad. I have a second Drobo and wanted to upgrade the second Drobo, so I removed a drive from the second drobo so I could install it in the drobo with the bad drive. However, even though I'm not trying to preserve the drive coming from another drobo, I get the message, "Drobo has detected at least one drive from another drobo disk pack" and I can't proceed (I get all red blinking lights). What should I do differently? Is there a way I can prep the drive I'm putting in the drobo so it doesn't know it came from another disk pack?
I have a VNXe3100 with what I think is a bad caddy, (I already replaced the disk). I need to reset the device to see if it will pick up but the service password won't reset to default.
I am out of warranty and support. do any of you know how to resolve this issue?

I reset it the VNXe3100 from the reset button on the back. I was able to reset the login password but the service password won't change to default.

We have a client who is using NAS QNAP TVS-882 with 5 drives(6TB NAS DISK EACH) configured in RAID 5.

She uses this to edit videos from her PC. The main problem here is when she edits the video, video lags and becomes slower than editing a file from a local PC directly.

She only uses one SSD as cache pool.

What would be the best solution to improve the read/write performance?

Would it be possible to add two SSD into RAID 1 and keep the RAID 5 with existing HDD? Then create a logical drive for only current editing files in the SSD. Keep the nonediting files in the RAID 5?
I'm having difficulties when trying to install my windows 10 to my m.2. When I enter BIOS I see my m.2 normally and I select to boot from my UEFI flash drive w10 and I'm able to put the product keys etc. But after installing windows 10 my pc restarts and it starts the windows installation from the beginning (where you select language etc). And when I restart my PC and go to BIOS to boot it through my M.2 it only starts BIOS over and over again. I feel like I have tried everything. I've changed my BIOS settings back and fourth and even updated my BIOS without any results.


Windows 10 Home 64bit installation to Samsung 970 EVO plus 500gb m.2 with ASUS ROG STRIX z370e gaming mb.
I am looking for an automated way (think PowerShell or BAT/CMD file) to "virtually" (since I am not in front of this hardware) unplug and replug in a USB hard drive.  I found some of the DEVCON stuff from Microsoft, however, that looks dated to say the least.  There must a modern, easy way to do this.

Storage Hardware





Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.