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.

Share tech news, updates, or what's on your mind.

Sign up to Post

We have Dell r730 running Solaris 11 and MD1420 storage array connected through perc h830 raid controller. MegaCli is unable to collect disk information.

The command is /MegaCli -PdList -a0

and the error we get is:
ERROR:Could not detect controller.
Failed to get ControllerId List.
Failed to get CpController object.

Any suggestions? Is there a different software that can be used under Solaris 11. Mainly we are trying to check disk status every few hours through cron job, so that any disk failure can be notified through email in a timely manner.

Similar hardware running Solaris 10 x86 works fine.

/MegaCli -PdList -a0 | grep -i "Firmware state"
Firmware state: Online, Spun Up
Firmware state: Online, Spun Up
I'm struggling to connect a Macbook to a Microsoft Azure file share storage account. I have it working on 3 Windows machines. What's strange is an open port scan says that the port 445 is closed, and yet the Windows still work. Really need to connect the File Share to the Mac. Grateful if someone could help advise.
I have a desktop computer (Alienware) with four internal hard disks, with a RAID motherboard.  Two of the disks are striped (the c:\ drive) and the other two disks are mirrored (the d:\ drive) and contain all my data.  The c:\ drive contains my operating system (Windows 7) and all my programs.  I want to replace the c:\ drive disks with 2 SSDs.  I want to clone the c:\ drive and then transfer this clone to the 2 SSDs, which will constitute the new striped c:\ drive.  I have cloned and transferred an old hdd's content to a new SSD, but without RAID.  It was easy.  But how do I do the same with a RAID system?  I'm at a loss as to how to proceed.  

Thanks, WmABradnan
I am looking to build a cheap storage device using a DELL perc H330 PCIE RAID adapter and a few HGST 6TB SAS disks.

I tried using a couple of older (6+ years) desktop motherboards but neither of them would allow the RAID controller as a boot device.

Can you please recommend something relatively cheap that's proven to work in this scenario? UK market preferrably, can be second hand.
Hi, i have a 3 server S2D setup that i want to add new SSDs to.

Currently i have a storage pool with 10 HDDs and 2 400GB SSDs on each server. I have 1 volume using 50% capacity of both.

I want to add 3 new SSDs into each server that are 1.6TB each and create a new volume that uses 33% of HDD and new SSD storage.   Once i have then migrated the data off the existing volume i will delete it and create 2 more using roughly 33% each.

Is it possible to do this? Any help is appreciated!
Hi, I have a very old server HP Proliant ML330 G3 with an Adaptec SCSI Ultra3 and two disks.
This is not a RAID1 system: there is OS (Windows 2003 SBS) in disk1 and data folders on disk2.
disk1 is dead.
There are no backups (file system level or systemstate).
Since this server was also a domain controller, I need to reinstall from scratch
If I install from scratch Windows Server 2003 and re-create  a domain with exactly same name of previous one, same users (possilby with same password) could be works fine with workstation ?

Can I use such controller to create a true RAID 1 volume, instead of two separate disks?
Thank you
I am migrating an existing vcenter server install to new Hardware,
The old hardware is ibm bladserver with 3 esxi 6 servers and ibm DS3524 1746-HC2 storage connected with SAS
vsphere 6.7 appliance

The new hardware is:

2 hpe proliant g10 servers with esxi 6.7 attached with sas to HPE MSA 2052 SAS Dual Controller SFF Storage

I need to know the best way to migrate all of the vms including the vsphere appliance onto the new hardware.
My company is currently deploying Windows 10 workstations, replacing current Windows 7 machines. Out biggest hurdle appears to be migrating  user data from the old Windows 7 workstations to the new Windows 10 computers. We would like to I mplement a fast and easy method to accomplish this task on each user’s computer (one at a time)! We are currently employing a simple copy and pasting the user profile from the 7 machine to the 10 machine.
                        This method is working fairly well but I know it can be accomplished more easily and more efficiently with a script run from the command line, e.g. Xcopy or Robcopy. The problem is both commands require a lot of switch options to choose from and I am not really comfortable using them. We first attempted to use Windows easy transfer, but it was only used to copy or move the user profile from the user’s workstations (Windows 7) to a storage location across the network to another Windows 7 machine. From that point we would copy user data from that centralized Windows 7 storage location the the new the user’s new 10 machine! I know that last step seems a bit much, but in migrating the data we wanted to make sure the user data was in a secure location on the network.
                         Can someone provide me with an alternative method to migrate this data? Third party applications are forbidden in our org. I would prefer to employ Robocopy if you guys can write …
Acronis wants almost $900 for 1TB of Cloud Storage for 1 year. Isn't that a little outrageous? Why would I want to do that when my OneDrive account has 1TB for free?

What could Acronis's cloud storage bring to the party that would justify that? (Yes it will be used on a server running their backup software).
Cluster nodes are Windows Server 2019 with the latest patches as of this post.
Guest is Windows Server 2016.

We have a two node-Hyper-V cluster.  We were merging a rather large snapshot into one of the VM's (deleting a checkpoint).  

The VM was on node A but node B owned the storage and network resources.  Node B went offline because another engineer realized the IP address of the node was wrong so changed it without letting anyone know.  The event log of the node the VM was on has the following:

* Event ID 19070 - Background disk merge has been started - this is when I started the disk merge.
* Event ID 19050 - VM failed to perform the operation.  The virtual machine is not in a valid state to perform the operation - this is when we had the issue with node B.
* Event ID 16400 - VM cannot access the data folder of the virtual machine.  - VM is down hard at this time.
* Event ID 19100 - The description for Event ID 19100 from source Microsoft-Windows-V-VMMS cannot be found.  - When I saw this error, I about lost my lunch.
* Event ID 19070 - Background disk merge has been started - looks like the disk merge started up again.
* Event ID 19090 - VM background disk merge has been interrupted.  - Ouch.
* Event ID 19070 - Background disk merge has been started - looks like the disk merge started up again.
* Event ID 19090 - VM background disk merge has been interrupted.  - Getting nervous again.
* Event ID 19070 - Background disk merge has been started - looks like…
Hello everyone.

For starters, I do not make a lot of money in my self-business.
So, I have to get what I can get, in order to grow.
With that said.

I have just purchased an Intel SR2500ALBRP
The motherboard: S5000PAL

In the following image, you will see a BLUE set of SATA cables with a single PLUG at the end.
Intel SR2500ALBRP RAID SATA Connector
Now, The PCI riser assembly has only a NIC Card on it with DUAL 1G nics.
My question is simple.
WHAT RAID Card do I need to get, to connect this with?

Hi Experts,

I'm new to this technology, i've read the docs from main pages and still not really understand how it organize data storage.

For specific, how it store data if there is only 1 leaf? And how about 2 leaf? 4 leaf? It stores 100% data on each leaf or split equally? (25%-25%-25%-25%)

Please enlight me, many thanks for reading this.
I need a file web storage system that can be accessed with a simple login password to access files for a charity club instruction.   It will be confusing to the membership if an app has to be installed and setup.  This should function like a web site with an Internet address and password access.    Read only would be  good.  But I can write protect the files if this option is not available.  The files will be used for instruction.
We have an MD3200 for storage in our HYPERV cluster.  We used the wizard to create a pool on the MD3200 which seems to have set aside 2 disks for redundancy (basically, a RAID 6, I believe).

I create a virtual disk in the pool, I wanted to use up all the available space.  However, the MD3200 starts complaining about > 80% (I believe the default) of the pool being used up.  Can I just turn that off or do I truly need to ensure the virtual disk takes up less than 80% of the space of the pool?

Hi, I have an odd question that would like to know what others are doing these days.  I know keep doing the same thing because that is they way it has always been done, isn't the best choice.

I am setting up a RAID 1 array on a HPE ProLiant DL360 Gen10 server with Smart Array P408i-a.  In addition, I have 3 HPE 300GB SAS / 12Gb/s HDD's.

So, my intent is to setup a RAID 1 array with a hot spare.

This will be supporting a Windows Server 2016 - Standard domain controller.

With all that being said, what strip size would you use in this scenario?  64KiB?  128KiB?  256KiB?

Currently, the default is 256KiB.

Just curious.

Thanks in advance.
Hi, I am using ESXi 6.0 cluster with 9 nodes and 2 SAN (MD3200 and MD3800) through iSCSI.
I am trying to move one particular VM to one storage to another.
Every time, about 94%, I got error "timeout error".
I tried with this solution:

and raised fsr.maxSwitchoverSeconds  to 900, but I got same results.

This VM has just one disk (with one snapshot created last week).

Any suggestion?
I can't get one of my servers to power up. I don't believe it's a hard drive issue, more importantly for the sake of this question, I don't believe it's a hard drive issue. How do I recover data from the RAID?

Some time back I had experts help me with a bunch old DVD I wanted to put in the cloud.  Today I have a series of DVD that the computer just doesn't recognize as to "No DVD  in D: drive".  I have checked the DVD and seem somewhat dirty or grimy or scratch? (that is my appreciation) - when I place them in my hands they do seema bit scratched and some grime "maybe" in some places; I say grime because if I press it it smudges  somewhat (if u take a cloesup on certain areas u can see them).  So i would like to know if you guys can take a look at the image and recommend if there is a way to fix them or clean them or what can I do to be able to have my computer read them.

Consider a disk with a sector size of 512 bytes, 1000 tracks per surface, 400 sectors per track, 5 double-sided platters, average seek time of 6 milliseconds. Suppose that a file containing 100,000 records of 200 bytes each is to be stored on such a disk and that no record is allowed to span two sectors. Assume the disk rotates at 10,000 RPM and one track of data can be transferred per rotation.

a. How many records fit into one sector?

b. How many sectors are required to store the entire file? If the file is arranged sequentially on disk, filling surfaces first, how many surfaces are needed?

c. What is the maximum number of 200 byte records that can be stored using this disk?

d. What is the time required to completely read an entirely full disk? Assume ideal circumstances.
RAID levels 0 and 1 can be combined to make a stripe of mirrors (RAID 10) or a mirror of stripes (RAID 01) configuration.  Which implementation would you prefer to use and why?
Will Centos 6.5 running the 2.6.32-431 64 bit Kernel support an m.2 nvme ssd plugged into an NVMe to PCIe adapter in an HP DL585 G7 server ?
Dear Experts

I have a question related to controller M1015. I want to use it in IT mode for Unraid server.

In specification I can read this:
The ServeRAID M1015 SAS/SATA Controller has the following specifications:

Eight internal 6 Gbps SAS/SATA ports
Supports SAS and SATA drives (but not in the same RAID volume)
Two Mini-SAS internal connectors (SFF-8087)
6 Gbps throughput per port
LSI SAS2008 6 Gbps RAID on Chip (ROC) controller
x8 PCI Express 2.0 host interface
Supports RAID levels 0, 1, 10 (RAID levels 5 and 50 with optional ServeRAID M1000 Series Advanced Feature Key)
Connects to up to 16 SAS or SATA drives
Supports up to 16 logical volumes
Supports LUN sizes up to 64 TB
Configurable stripe size up to 64 KB
Compliant with Disk Data Format (DDF) configuration on disk (COD)
S.M.A.R.T. support

What I do not understand is - does this controller allows to connect 16 physical SATA drives? If yes why it reports only 8 internal ports?

many thanks for your advice

Hi, I have a cluster ESXi 6.0 with 9 nodes.
I noticed very bad performances on different VMs on my infrastructure.
According to resources utilization on entire cluster, I would exclude RAM / CPU issue.
I suspect there is some issue on storage side (we use PowerEdge MD3200 / 3800) through iSCSI.
I ran esxtop on some hosts, occasionally I noticed very high DAVG / KAVG values.
My question is: what would you do next?
Through esxtop I can find the "affected" lun.. isn't there a more efficient way to identify the VM (or VMs) that are causing performance issues?
Thank you
Experts out there, I have a question on VMware datastore, hope someone will shed light on it. VSphere client shows a value for "storage usage" is 40 GB and the vmdk file size is less than 40GB. My understanding is that storage usage is included vmdk with some other files (vms,swap, etc). Is there any equation for that extra space usage? like 5% overhead etc.
Good day,
We have a VM host that runs two server machines.  The first is the DC/FS and it works great.  The second machine is a terminal server.  It constantly is freezing on the users and it is getting frustrating.  Here is some info:

Host machine is running Server 2016 Standard.  Its specs are:

HPE Proliant DL380 G9
Xeon E5-2620 v3
RAID 10 for the virtual disks

Server is stable, no issues.

The host machine allocates a large portion of RAM to the DC and the TS.  The DC currently has 8GB and 8 virtual processors.  The TS has 10GB RAM, and also 8 virtual processors.  Originally I had the TS with less RAM and processors, but in trying to fix the freezing issue, I increased the resources.  I plan on bringing them back down.

The TS has only 3 users signing in.  They use the same domain account to log in to the server.  The TS is configured to allow the same user to log in multiple times.  It is light usage.  The TS exists to run only one program.  While using that program, the users may open Word or Adobe, but not much of anything else.  About 4 or 5 times a day, the server just stops responding to that user.  The other users logged in do not experience the same.  It will just spin and spin.  The remote connection never breaks.  Frustrated, they just click the x on the top blue ribbon, and re-log back in.  Then its totally normal until it freezes again.  

During the freeze, the internet is working normally, the others users aren't affected.  A VPN …






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.