Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

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Hello Everyone,

A general question about VMware 6.0 best practice re. total storage group size available.
We have an EMC VNXe3150 SAN with 4 Storage groups all around 1.8 TB of usable space. Some of them have a lot of space left whilst others are down to what I will call bare minimum, e.g. 70 GB and 100 GB out of the total 1.8 TB. I did not use the rest of the space as I figured it is best to leave a bit for the system, but that is based on my experience with physical servers. I did get a warning from the VMware about space running out and so I left it. Should I leave more? Oh and just to clarify the 3 ESXi hosts have disks as well (we do not host the Linux o/s via USB or SD card, rather built in disk) and they are around 130 GB and 80% free so I am talking only about the actual storage available from the attached SAN to the VM's through the 3 hosts. Finally we always Thick provision (Eager Zero) so all space needed is always assigned, i.e. I don't over provision so the space left over should never be needed by a VM for space.Thanks in advance!
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I have an old PowerEdge 1900 that has a Perc 5/i in it.  I go into the configuration utility and select RAID5 for setup.  I have 4 750gb hard drives, so it comes out to 2.2 tb, or close to it.  I initialize the disk and when that is done I step through the rest of the process and on the last page I select "APPLY" then CTRL+ALT+DEL to reboot.  Upon rebooting there is a message that says "All of the disks from your previous configuration are gone".  It tells me that there are 0 logical drives on the host adapter, and obviously, 0 logical drives handled by BIOS.  What is the issue?
Hello -

I have a DELL PE R710 and it currently has 6 HARD DRIVE, 146G, SERIAL ATTACHED SCSI, DU, 15K, 3.5, SEAGATE, HUR and a PERC H700 Integrated RAID Cont roller, 512MB Cache, x6. I would like to use two Samsung SSD 850 EVO (Model: 75E120) as a RAID 1 (OS), and 4 more drives as a RAID 10 (DATA FTP). My question is if I replace my existing drives, what hardware will I need to convert the server drive bays and will this work with my existing PERC? Will it recognize new drive and speed capabilities?

Thank you so much!

An esxi host has two drives. One drive is used for the hosts, the other is used for backups.

What I'd like to do is use part of that second drive as storage for one of the vms so it can become a backup server for other things on the network but I'd also like to backup my vms to this local drive.

I know I can make snapshots, including making them onto the second drive but I'd like to have full backups that can quickly be imported should the first drive suffer problems.

Any way of doing this?
I have a server 201 vm residing on a 48 drive SAN that is RAID 10. I am wondering if it is worth configuring the vm OS disk for mirroring? What is everyone's thoughts on doing this? any benefit/drawbacks?
I have purchased plenty of external drives and never had a problem making them work with Time Machine. Until now.

I pleaded in the drive, selected "Encrypt", added the password...

I was then told it would delete everything on the disk and said OK.

Then, it generated an error.

When I insert the drive get the attached error:

Disk error
What shall I do next?

I have a HP Gen6 server with a P410i controller. ESXi is giving me the following warning:

We also notice the performance of our server is slower and the backups seem to often fail.

I could not find any errors in the ILO. Does this mean I just need to replace the battery of the controller?
(Disclaimer: I'm not an Oracle expert, I'm a sysadmin assisting our DBAs with this issue)

So this is a real head scratcher.  We're rebuilding an Oracle analysis cluster after a major storage hardware failure.  There's a shared staging iSCSI mount that's set up to be shared between all the compute nodes and set up through multipath/ASM as an OCFS2 partition.  When we attempt to load the previous backups from the staging partition, we get the following error:

Import: Release - Production on Thu Jul 13 09:53:46 2017
Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.
Password:Connected to: Oracle Database 11g Enterprise Edition Release - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
ORA-39001: invalid argument value
ORA-39000: bad dump file specification
ORA-31619: invalid dump file "/u01/app/oracle/data/data_pump_dir/TEST.DMP"
ORA-27072: File I/O error
Linux-x86_64 Error: 22: Invalid argument
Additional information: 4
Additional information: 1
Additional information: -1

Open in new window

The head scratcher is that:

1. We attempted this with one of the backups and it failed, so we ended up making our own test dump file to further test to make sure it wasn't the backup file that was bad.

2. This error ONLY when loading files from the OCFS2 partition.  I set up a second iSCSI share that was just formatted as ext4 and impdp loads the dump file just fine.

3. We've deleted and recreated the OCFS2 partition with several different cluster sizes and whatnot and we always get the same error back.

4. I can read and write to the filesystem on the staging partition just fine.

File permissions are as follows:

-rw-r----- 1 oracle oinstall 184320 Jul 13 10:17 TEST.DMP

Open in new window

System is Oracle Linux 6.8 (clone of RHEL/Centos)

Any ideas...?
Hi folks,

I recently inherited a Quantum-branded Certance LTO unit complete with tapes. Most tests pass, but as soon as the drive gets to writing 13GB of data, it fails. Does anyone recognise this symptom and have an suggestions for a fix?

I have two identical win12 servers- the storage is via LSI mega Raid 5/Raid6 adapter.  I have no network storage between the servers. Just the local network.

Will this work with just the two servers on the lan?  CAFS will only be for file sharing availability not hyperV maintenance or SQL hosting.

I've read through this failover guide but it's unclear because it goes on, "if you use iscsi" so i'm taking it that an iscsi san between the two servers is not required but other blog posts say that it is.

thanks and regards!
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I have a synology with 2 4TB HD raid 1 and 1TB of data (as per the data analyzer tool on the synology, and ThreeSize) but is the disk overview it shows 98% full

Please advice

bought new LARGE SSD and after adding new LARGE SSD Disk to windows 10, I can't expand the volume from disk administrator.

I use LSI raid card and I follow the support staff's instruction on expanding the SSD volumn to the level I want, and then in Windows 10 disk administrator, I see the new volume but it seems i can't make use of it?

anything I can do to make the volume circled become one volumn ?

tks. you can see that there are option for c:\, marke partition as active, should I choose that?

and I checked this one and I am not sure if I should use this:
We are trying to decide if we should use raw device mappings (RDM) from our NetApp or storage from the VM datastore on VMWare. What would be the best solution and can you send me references?
I have an HP MSA 2040 and I just inserted a replacement drive and I want to start the rebuild.  I know it's supposed to be automatic, but is there a way to manually start the rebuild and is there a way to monitor the rebuild?


My SCO Unix RAID 5 server have 3 HDD. Today 1st and 2nd HDD failed only 3rd HDD showing ONLINE. Is there any chance of data recovery if i install new HDD in 1 and rebuild and then the 2nd HDD and rebuild.
Is there any chance of data recovery.
Hi Experts,

I've just purchased a Western Digital Elements 2TB portable USB 3.0 hard drive.  It's advertised as being compatible with WinXP and USB 2.0.

When I plug it into my old HP DC7700 SFF desktop PC running WinXP Pro SP3 (front ports, or rear, all of which are USB 2.0), it shows the expected New Hardware messages next to the systray, and finally says it's installed and ready to use, and I can see it in Device Manager, but not in Explorer, so I don't think I can use it on this PC.
Tried using Device Manager to update the driver from WinXP Pro CD and then from the web, but it says something like there was no better driver found, in both cases.

All the same things happen when I connect it to a Dell Latitude D420 laptop, also running WinXP Pro SP3.

But when I try it on an HP laptop which is running Win10 (also USB 2.0 I think), I see no problems there.

Any suggestions of what could be causing this, and how I should resolve it?

Let me know if you want any screen shots or other info.

I typically configured my spinning hard drives for the OS and Data files as Raid 1. If something happened then I just swapped out the drive and kept working.

When I got the SSD drive for the OS I could only afford the one drive. Now the prices have come down and I was thinking of again using Raid 1, for availability.

Talking with Samsung Tech Support they said that it would work but that they don't recommend it due to the fact that it would shorten the life of the SSD.

Having just had the drive fail and while waiting for the replacement I am thinking of getting my system up with a new SSD and when the replacement ships putting it in a Raid 1 set.



We are setting up a new network, we have the following:
2 Servers XEON (1 8gb RAM and 1 32 G RAM), both have RAID and 3 x 4Tb drives.
2 NAS Boxes (both have 4 x 3Tb drives and RAID.
2 x 24port Gigabyte switches
Plan to use Windows server 2016 on both
There are 26 workstations that will be connected (all Windows 7 32 bit) due to the nature of the applications they will be running (the applications might work with Windows 10 32bit, but needs more testing to ensure everything would work. Yes they must be 32bit as most of the applications won't work on 64bit machines.
We have 4,000 cds (ISOs that will be stored and accessed by workstations as required, loading them (I expect they will be stored on server or NAS box, into virtual cd drives on workstations and 164 applications to be installed on each workstation (needed to access data from some of the ISOs.
Would like to use WSUS to provide windows updates to network.
Will use an intranet for in-house stuff and general info.
Would like to use one of the NAS boxes for daily backups storage.
Also like to setup VPN for staff to access there specific info from home.
Administration data to be kept separate from workstations application (ISOs).
Backups of all admin data to be placed on NAS Box.
Using AD and Group Policy on Server to manage user/admin logins and locking down workstations from users doing things they should not be doing (e.g. installing software, changing desktop setting, getting to control panel etc etc).
Hello experts,

Am I able to promote a 2012 r2 Storage Server to a domain controller?
I have run into a issue that I have two virtual domain controllers currently over shared storage and they are not serving our domain well at all and are very slow, I need a physical host.  I have one that was purchased as a file server but we are not actually using it for that, it came with 2012 R2 Storage Server.  

Thank you,

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I have an Azure VM with size 'Promo D3_v2 (4 Cores, 14 GB memory)' which provides a 128GB OS Disk.

I need to increase the size of the OS Disk or add another Disk to support additional data storage.

How can I do that?

Thank you.
Hi.  Some of my users are showing large amounts of storage taken by "Other People" (see screenshot).  Problem is, it appears no way to delete this data and free up the space.  I've run CCCleaner and Disk Cleanup and no help that I've seen on the web.
Hi everyone.
                        i have a recursive error on a daily backup.

06/23/2017 13:24:25 ANS5216E Could not establish a TCP/IP connection with address 'VWSAPASTSMSRV01:1500'. The TCP/IP error is 'Unknown error' (errno = 10061).
06/23/2017 13:24:25 ANS9020E Could not establish a session with a TSM server or client agent.  The TSM return code is -50.
06/23/2017 13:24:31 ANS5216E Could not establish a TCP/IP connection with address 'VWSAPASTSMSRV01:1500'. The TCP/IP error is 'Unknown error' (errno = 10061).
06/23/2017 13:24:31 ANS9020E Could not establish a session with a TSM server or client agent.  The TSM return code is -50.

i think it could be the 1500 port, but  there is no firewall between server and client.

Any idea?

Thanks in advance.
The RAID controller is a PERC 4e/Di (Embedded).
It has a RAID5 array made up of 4 disks. Size is 558GB.
One disk had failed but the disk and data were still accessible.
The OS is installed on a separate RAID1 which is in optimal condition.
I rebooted the server and it had issues during the boot process. Going into the controller config, it seemed it had lost the information on  all the logical drives. It was giving an error saying NVRAM and disks do not match. All disks showed as 'Online' rather than 'Ready'.

I re-created both RAIDs exactly as before (minus the failed disk) and the server was able to boot back up. However, the RAID5 drive does not appear.
In Disk Management, it shows as: 'Dynamic' Invalid. If I try to reactivate:
'Virtual Disk Manager: This operation is not allowed on the invalid disk pack"

Using OMSA, the RAID 5 array status is 'OK' and there is no issue with the 3 remaining drives.

I found this video using a hex editor to bring up an invalid disk but the situation is different :

Is this a viable solution to recover this disk or is there a better way?
I had 4 x 2tb drives installed and I purchased 4x4 tb ironwolf drives as these were shown to be compatible.

I removed a drive one by one and used the storage manager to rebuild the volume. That all went as planned it just took a day and a half.

The raid used was raid 10 and all the drives passed the smart and ironwolf tests.

I had expected to have 8tb 2.6 used (the previous drives had that amount used)  but it only shows a total of 4.54tb overall.

is that correct for this type of array and drive size? I used the synology drive calculator and that says different. looking at the picture at 37% that seems right 100% would be about the expected 8

I have a QNAP NAS with an iSCSI LUN, attached to a Windows Server 2012 R2 box. Raid 5, 10TB, thin provisioned.

Deduplication is enabled on the server and volume.

The volume completely filled up, and the disk took itself offline in Windows disk management.

If I hover over the disk, it says 'the disk is offline because it is out of capacity'. If I try to bring it online, nothing appears to happen. If I open the event viewer, I see these two events appear every time I try to bring it online:
Warning: An error was detected on device \Device\HArddisk2\DR6 during a paging operation
Followed by:
Disk 2 has reached a logical block provisioning permanent resource exhaustion condition.

The only way I can bring it online is to use diskpart, but it only comes online in read only mode, therefore I cannot delete any data from it to free up space.

I did manage to bring it online in write mode by attaching it to a 2008 R2 box, but when I delete data, it doesn't update the free space correctly. I can delete GBs of data, but only a few MB are shown as free when looking at the properties of the disk. I suspect this is a result of the dedupe.

The disk does show as having 1GB free now, even in 2012, but it still only comes online in read only mode.

One final thing I tried was to use diskpart to change the read only attribute to 'No', however when I do this, the disk immediately takes itself offline again.

My final option is to move all the data off on to another …






Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.