Hard Drive / Volume (DroboPro) has suddenly became read only!? I think its due to a permission issue and i cannot correct it

Bit concerned, my iMac seemed to crash yesterday... when i restarted the iMac .. i got the following message:
OS X can’t repair the disk “DroboPro.”
You can still open or copy files on the disk, but you can’t save changes to files on the disk. Back up the disk and reformat it as soon as you can
At the time the iMac crashed, i was downloading some files over the web... and at the same time importing a movie into iTunes. I believe it was iTunes that possibly crashed first... it seemed to be taking longer than normal to import a movie into iTunes, but left it running and went and ate dinner. when i returned, i couldn't wake the machine from the screen saver. it appeared to have locked up. I had no choice but to hard-reset the imac. when it rebooted, the external drive (drobopro) was in read only mode - i can read from it but can't write to it.
I have been initially trying to trouble shoot this as a DroboPro issue - but that drive seems fine. most of the reading i have done points to a permissions issue which is something in OS X that needs fixing.
I found these support articles on the drobo website
1) http://support.drobo.com/app/answers/det...d-only-and
2) http://support.drobo.com/app/answers/det...ld-i-do%3F
Per the first article, I tried using drobo dashboard app to shut down the drobopro, then restart my imac and then bring the drobopro back up again to clear the permissions issue. that didn't work. (I actually tried that twice)
When I go into disk utility on the imac, and click on the drobo disk... i cannot click on the repair permissions button, its greyed out. i can click on verify disk... when i readthe details that come up.. in red it says Invalid Node structure, The Volume DroboPro could not be verified completely, the File system check exit code is 8; Error: The disk needs to be repaired, click Repair disk.
i checked the tools in drobo dashboard and according to drobo dashboard the disk is healthy. its about 50% utilised; so definitely no space issues. i have 4 x 2TB disks in it and setup i a high redundancy mode so actual available space is about 5.4TB, and there is 2.62 TB available.
I then looked back at the first article again - and it says to get cocktail disk utility. i got that and went to PILOT tab as suggested, but the only option is to repair permissions on Mackintosh HD. so i went ahead and repaired the permissions on Mackintosh HD, but that hasn't fixed the issue either. The last options seems to be to do a super user move via the Apple Terminal, which i am a little apprehensive about doing - so i have avoided that.
Drobo support suggested i try DiskWarrier - i have downloaded that app and tried to repair permissions using that. again i can only run that on the imac disc, but that doesn't work either!?
I am stuck now, what shall i try? look forward to see if anyone can help.

Ok, so I have to apologise for that fact that a minute after making this post I managed to fix the problem...
Blew the dirt from the connector port. Really...? You ask...
This sure did fix my problem and after doing some more hard searching through the forums here looks like it fixed others too.
Dirt in the connector port meant the iPhone thought (for some reason) it was connected to a dock or such, thus removing the controls.
Anyway, cheers and hope this might help someone else.

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HT201250 My external hard drive suddenly says "read-only" should I run a disk repair on it and what does that do?

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Fix Permissions for a Locked Drive
Open Terminal in the Utilities folder. Paste the following at the prompt. Press RETURN after each. The first command will prompt for you to enter your admin password. It will not be echoed to the screen. After entering your password press RETURN again.
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sudo chmod a+rx /volumes/*
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Time Capsule has suddenly gone "Read Only"

My Time Capsule has suddenly decided to stop backing up from my iMac, however the MacBook Pro still works fine with it. I get a message that it is now "Read only" - trying to reselect the drive has no effect.
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I've just had the same experience, suddenly discovering that my Time Machine volume on my external hard disk had become a read only volume.
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Since hard drive restore, backup gives Disk Repair, Read-only errors

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After a hard drive crash last week, I restored the new HD using my historically reliable wireless Time Capsule (TC) with Time Machine (TM). But ever since, backups have ceased to work. Now, TM spins for about an hour before returning the following errors in sequence:
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I have of course tried re-booting everything, as well as un-mounting and re-mounting the TC: Computer, heal thyself! No luck.
Any guidance is appreciated...
(PS If there's a log file I should post that might help with diagnostics, just let me know where to find it.)

I have suffered the same error messages, but without a hard disk crash before it.
I copied the backup-file from the TC to a separate drive, erased the TC, re-installed it, copied the backup-file to the TC en re-initiated TM only to be welcomed with the 'The backup volume is read only'-message again.
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Many USB keys have a small lock switch that will make them read only. Check to make sure that hasn't slipped accidently to the lock position.

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Solved: I cannot manage (bring online, initialize, partition, format, or write to) a VHDX hard drive once it has "Enable Virtual Hard Disk Sharing" enabled.

Hello,
Issue:
On a Virtual Machine with a secondary VHDX attached, I cannot manage (bring online, initialize, partition, format, or write to) the VHDX hard drive once it has "Enable Virtual Hard Disk Sharing (VHD Sharing)" enabled.
Questions:
Should I be able to manage (bring online, initialize, partition, format, and write to) a VHDX hard drive once it has VHD Sharing enabled? If I should be able to manage it, what am I missing?
Topography:
One SuperMicro Cluster In a Box (CIB) with 2012 R2 Data Center on each node. Microsoft Failover Cluster installed and working on each node. The Failover Cluster Servers on each host passes all cluster validation tests. Two Hyper-V 2012 R2 Data Center Virtual
Machine (VM) servers, one on each node. 1 common Cluster Shared Volume (CSV) and 1 Generation 2 Scale-Out File Server (SOFS) shared volume both Resilient File System (REFS) formatted. One 5 Gigabit (Gb) Virtual Hard Drive Type X (VHDX) file on the CSV and/or
SOFS. Integrity bit and read only turned off on VHDX file.
Each of the two Hyper-V VMs have one 127Gb VHDX Generation 2 primary hard drive and 1 VHDX secondary hard drive attached, both on SCSI Controller #1.
Background:
If I start VM1 without the VHD Sharing enabled on the secondary hard drive, I can bring the drive online, initialize, partition, format, and write to the drive.
If I enable VHD Sharing, I can no longer modify the drive in Disk Management in any way. With or without VM2 running.
Both VMs and the CSV and SOFS are on the same host cluster server, or not, no difference…
The VHDX is referenced either by the CSV name C:\ClusterStorage\Volume1\TEST1.VHDX
or a Shared Folder name
\\sharedfolder\folder\Test1.VHDX .
If I start VM1 with VHD Sharing disabled and I format the drive, then shut down and enable VHD Sharing, the drive is offline and requests initialization which fails with an "I/O device error", every other attempt to manage the drive fails with
the same "I/O device error", error.
Events:
VDS fails to write boot code on a disk during clean operation. Error code: 8007045D@02070008
Log Name:      System
Source:        Virtual Disk Service
Date:          3/3/2015 11:39:18 AM
Event ID:      10
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Server1.Domain.local
Description:
VDS fails to write boot code on a disk during clean operation. Error code: 8007045D@02070008
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
    <Provider Name="Virtual Disk Service" />
    <EventID Qualifiers="49664">10</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-03-03T19:39:18.000000000Z" />
    <EventRecordID>27318</EventRecordID>
    <Channel>System</Channel>
    <Computer> Server1.Domain.local </Computer>
    <Security />
</System>
<EventData>
    <Data>8007045D@02070008</Data>
</EventData>
</Event>
AND
Log Name:      System
Source:        disk
Date:          3/3/2015 12:16:42 PM
Event ID:      153
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      Server1.Domain.local
Description:
The IO operation at logical block address 0x0 for Disk 1 (PDO name: \Device\MPIODisk1) was retried.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
    <Provider Name="disk" />
    <EventID Qualifiers="32772">153</EventID>
    <Level>3</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-03-03T20:16:42.017090000Z" />
    <EventRecordID>27333</EventRecordID>
    <Channel>System</Channel>
    <Computer>Server1.Domain.local</Computer>
    <Security />
</System>
<EventData>
    <Data>\Device\Harddisk1\DR1</Data>
    <Data>0x0</Data>
    <Data>1</Data>
    <Data>\Device\MPIODisk1</Data>
    <Binary>0F01040004002C00000000009900048000000000000000000000000000000000000000000000000000020488</Binary>
</EventData>
</Event>
Thanks again for any help,
Robert

Hi All,
I had to buy a Willy Wonka bar and spend a golden ticket to get an answer to this one.
We found that the default LogicalSectorSizeBytes of a VHDX is 512b. It needs to be 4kb.
The Host drive doesn't seem to matter CSV or SOFS. Below is a way to create a VHDX with the correct LogicalSectorSizeBytes.
In Power Shell, type --> New-VHD -Path C:\ClusterStorage\Volume4\Cluster2DataDisks\Cluster2Disk1.vhdx -SizeBytes 200Gb -PhysicalSectorSizeBytes 4kb -LogicalSectorSizeBytes 4kb
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Change the size, path and file name above to fit your Cluster Servers configuration.
Thank You
Sachin Kumar Support Engineer | Windows Server Setup Team | Microsoft Enterprise Platform for finding the answer to this one.
Hope this helps others.
Robert

Hi, I need to re-format my hard drive, as it has a virus, so will lose all my data including itunes. I therefore need to reinstall itunes - but if I do this will I lose all the music that I have bought? How do I reinstall music to the new itunes?

Hi, I need to re-format my hard drive, as it has a virus and is corrupted- so I will lose all my data including my itunes software. I guess I will need to reinstall itunes again - but if I do this will, I lose all the music that I have bought or imported into my library? How do I reinstall my library/playlists to the new itunes?
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Make a backup of your media and other important files.
Just to be safe, make a backup of your entire iTunes directory.
Restore computer or do whatever it is you need to do.
Restore your media and other important documents.
Install iTunes.
Try using search next time... this gets asked way too frequently.

I run my iTunes via a external hard drive, however it has lost all it's contents and I haven't backed up! What can I do?

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Many thanks
Cobwebs73

If all of your media is from iTunes, don't worry about it. You can either transfer everything on your iPad from your iPad to your commputer; and/or you can redownload from iTunes all music and apps, and most of everything else.
If any of your media is from other sources, that's not so easily recoverable. If it's on your iPad, you can transfer it to your computer via a third-party application such as Senuti. (There are many alternatives to Senuti, some work just as well and are free.) Anything from non-iTunes sources and not on your iPad is completely gone, unless you have CDs or other physical media from which you obtained it stored somewhere.
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Hi, In-Correct -
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Hard Drive / Volume (DroboPro) has suddenly became read only!? I think its due to a permission issue and i cannot correct it

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