Read only USB drive

I have attached an NTFS system USB drive to my new imac and it comes up as read only... How can i change permissions for me to be able to write onto the disk.
Can anybody help?
Thanks

Install software such as the NTFS-3G drivers.
(62097)

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After 10.7.2.update cannot see SD card reader in usb drive. Used to appear on desktop and start iPhoto but now nothing happens. It is recognised by system profiler (usb hub), but cannot find it anywhere.

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My Macbook suddenly won't read my usb drive..

My 2012 Macbook Pro Retina suddenly won't read my usb drive (its a Kingston 16gb DataTraveler se9 if it matters).
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'Read only' hard drives/SD Card

I have run into this problem multiple times, with many different hard drives and SD Cards. When I plug the drive into my USB port and select 'Get Info', the permissions always says 'Read only'. Is there a security or sharing feature that I can turn off to enable me to write on external hard drives.
This occurs when the drive is formatted using a PC, in DOS format, I believe. If I format the drive into OSX Journaled, everything is fine. But it's annoying when a colleague gives me his USB key to put a file on and I can't because I can't write on it. The other example is with my SD Cadr for my camera, I can format the card on my camera, then I can't write on it from my computer, but if I format the card on my computer, then I can't write on it from my camera. This is beginning to be a big pain. Before Mountain Lion, I could write no problem, I believe there is something wrong with the permissions.
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I hope this thread of yours gains some traction as I am having a similar issue
I have a Windows-based home server here in the house, I can use "SMB://WHS_SERVER" to connect to it (just like I could in Lion & Mountain Lion) and can see anything that is on it's C: drive, but I can't see any actual files or folders on any one of the other three drives on the machine....
All four hard drives are NTFS and have the same admin user with full permission (to which I am telling OSX to log in as when it prompts me)
I've tried Paragon NTFS, OSX Fuse, and Tuxera... all to no avail.....
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Read Only Thumb Drive

I'm having a problem with "permissions" for a 1G Thumb Drive. Basically, I am being offered "read only" for this thumb drive. Using Utility, I can verify the drive, but the repair permissions options is grayed out. I cannot erase and reformat either.
Using Get Info, I can see that the thumb drive is FAT16 and that the drive has "read only" permissions. I've ticked the "shared folder" box - still not able to write to the drive. There is no "ignore permissions" option offered. I have other drives of the same type that work with Leopard - just this particular one is for some reason locked into "read only".
I'm curious as to why this one, which is new and has never been used, will not work with Leopard (It works on my Panther notebook and with my Windows PC). I'm also curious as to how to change or repair permissions for this problem.
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Jill

It may be because a Leopard Mac can't write to a FAT16 file system. Reformat to FAT32 on your Windows box and see if that fixes the problem. Repair permissions is only available for drives that contain a Mac OS, since it only repairs the components of an Apple OS install.
Francine
Francine
Schwieder

WRT350N - How to read associated usb drive??

Ok, so I've set everything up. All our laptops have a wireless internet connection and our desktop is connected via ethernet. I have a Lacie USB drive I need to connect to the network. When I go through the Linksys software setup, the drive is recognized, but none of the computers can read the drive's contents. I have no security in place to ease the initial setup process. I can access the router page from the laptops, but that's as far as I can get. I'm sure I'm overlooking something very simple - I just can't figure it out. The USB light is lit on the router. Any help would be greatly appreciated!
Vince

go to start >> search for computer
type \\192.168.1.1 and click search .. you should find the drive.. let me know whether this helps you or not ..

Read only external drive

I'm trying to copy some photos from my Macbook Pro to an external drive, but the drive is coming up as read only.
When I plug it into a PC its fine and I've amended the properties to share all.
Any ideas?
I could copy them to a memory stick a couple at a time, but that could take some time.

It's likely the drive was formatted on your PC... in which case, it will be formatted as NTFS. This is a proprietary format that only Microsoft uses. OS X can read NTFS formatted drives, but it cannot natively write to them. If you plan on sharing the drive between a Mac and a PC, you can reformat the drive as FAT32 (NOTE: this will erase everything on the drive, so be sure to have a copy of your data elsewhere)... OR, you can install something like NTFS-3G (free) which will allow your Mac to write to NTFS formatted drives:
http://www.macupdate.com/app/mac/24481/ntfs-3g

Read-only floppy drive

For some reason my floppy drive mounts as read-only, so I can't copy anything to a floppy disk. I've tried changing the permissions on the block device, which in this case is /volsys/dev/diskette0/nonunique, but it won't let me. I'm running Solaris 2.6 on an Ultra2.

Thanks for the response. Unfortunately I still can't get it to work. For some reason I can't mount the floppy drive with the mount command- it only mounts using <volcheck>. Here's how I tried to mount it: mount -F pcfs -o rw /volsys/dev/diskette0/nonunique /floppy. This didn't work because the block device 'nonunique' only shows up when I use volcheck, and by that time the floppy is already mounted. I also tried mounting the floppy on /dev/diskette0, but it wouldn't let me (error said '/dev/diskette0 already mounted, /floppy busy, or number of mount points exceeded'). I have another Ultra2 with identical software that mounts the floppy read/write on the same block device (except it's called 'unnamed_floppy'). What's going on? Any more help would be greatly appreciated because this is driving me crazy.

Using reader and usb drive

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You need to ask in the Reader forum

Format read only usb flash

hi guys,
I've an usb (8GB) after I installed kaspersky bootable rescue disk I couldn't remove or format flash.
I tried mkfs.vfat & gpart & partitionmanager in kde

dmesg output is:
[ 194.900344] usb 2-2: new high-speed USB device number 3 using ehci-pci
[ 200.016793] usb 2-2: device descriptor read/64, error -71
[ 200.459575] usb-storage 2-2:1.0: USB Mass Storage device detected
[ 200.459710] scsi host2: usb-storage 2-2:1.0
[ 200.459848] usbcore: registered new interface driver usb-storage
[ 200.462201] usbcore: registered new interface driver uas
[ 201.461472] scsi 2:0:0:0: Direct-Access JetFlash Transcend 8GB 8.07 PQ: 0 ANSI: 2
[ 201.466264] sd 2:0:0:0: [sdb] 15687680 512-byte logical blocks: (8.03 GB/7.48 GiB)
[ 201.466876] sd 2:0:0:0: [sdb] Write Protect is off
[ 201.466884] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 201.467511] sd 2:0:0:0: [sdb] No Caching mode page found
[ 201.467518] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 201.479153] sdb: sdb1
[ 201.481757] sd 2:0:0:0: [sdb] Attached SCSI removable disk
[ 373.667900] cfg80211: Calling CRDA to update world regulatory domain
[ 1461.637851] perf interrupt took too long (2544 > 2495), lowering kernel.perf_event_max_sample_rate to 50100
[ 5662.434764] perf interrupt took too long (4996 > 4960), lowering kernel.perf_event_max_sample_rate to 25200
[ 7248.393740] sd 2:0:0:0: [sdb]
[ 7248.393752] Result: hostbyte=0x00 driverbyte=0x08
[ 7248.393759] sd 2:0:0:0: [sdb]
[ 7248.393764] Sense Key : 0x2 [current]
[ 7248.393772] Info fld=0x0
[ 7248.393778] sd 2:0:0:0: [sdb]
[ 7248.393782] <<vendor>> ASC=0xff ASCQ=0xffASC=0xff <<vendor>> ASCQ=0xff
[ 7248.393791] sd 2:0:0:0: [sdb] CDB:
[ 7248.393795] cdb[0]=0x2a: 2a 00 00 00 00 00 00 00 08 00
[ 7248.393816] end_request: I/O error, dev sdb, sector 0
[ 7248.393825] Buffer I/O error on device sdb, logical block 0
[ 7248.393830] lost page write due to I/O error on sdb
[ 7248.993670] sd 2:0:0:0: [sdb] Write Protect is on
[ 7248.993677] sd 2:0:0:0: [sdb] Mode Sense: 03 00 80 00
[ 7249.000140] sdb: sdb1
[ 7328.412684] raid6: sse2x1 3012 MB/s
[ 7328.469327] raid6: sse2x2 3079 MB/s
[ 7328.526004] raid6: sse2x4 3540 MB/s
[ 7328.526011] raid6: using algorithm sse2x4 (3540 MB/s)
[ 7328.526014] raid6: using ssse3x2 recovery algorithm
[ 7328.583897] xor: measuring software checksum speed
[ 7328.615969] prefetch64-sse: 8005.200 MB/sec
[ 7328.649321] generic_sse: 7046.400 MB/sec
[ 7328.649327] xor: using function: prefetch64-sse (8005.200 MB/sec)
[ 7328.766567] Btrfs loaded
[ 7328.865929] JFS: nTxBlock = 8192, nTxLock = 65536
[ 7328.892242] NILFS version 2 loaded
[ 7329.002056] SGI XFS with ACLs, security attributes, realtime, no debug enabled
[ 7330.208007] mmcblk0: p1
[ 7360.645827] mmcblk0: error -110 transferring data, sector 7744248, nr 8, cmd response 0x900, card status 0x80000b00
[ 7360.645836] mmcblk0: retrying using single block read
[ 7360.924458] mmcblk0: p1
Last edited by morteza (2014-11-05 03:13:58)

MBP/iBook won't read repaired USB drive?

I have an ativa thumb drive I've been using for a few months now. In the past few days suddenly my MBP (also an iBook) gives me the message "Disk you've inserted cannot be read by this computer - Initialize / Ignore / Eject."
So I opened Disk Utilities and ran 'repair disk' and it said minor repair was needed to the header. Ran repair disk it says disk is repaired. Run verify disk and it stops saying the header needs minor repair. Run repair disk, it says disk is repaired. Computer still won't read it.
I boot up from my startup disk and again open Disk Utilities from there. Run Verify Disk and Repair Disk and both say no repairs are needed? For grins I checked my HD and a minor problem was found so I ran repair disk on it. Disk Repaired. I've rechecked both drives nultiple times and each time the reslt is no repair required.
I launch from my on board system (i.e. without startup disk) and again computer says disk can't be read - initialize / ignore / erase? In fact I get 5 windows with that same message in rapid file on my screen.
Any idea what gives? If both drives are OK - why won't it read the info as before???

See KB Articles:
http://support.apple.com/kb/HT1411 Apple Portables: Resetting the System Management Controller (SMC)
http://docs.info.apple.com/article.html?artnum=2238 Resetting your Mac's PRAM and NVRAM

My external hard drive is suddenly locked. It doesn't unlock through 'get information' as I'm restricted to read only.

My external hard drive is suddenly locked. It doesn't unlock through 'get information' as I'm restricted to read only.

The drive has malfunctioned and corrupted itself. If that has ever happened before, or if it ever happens again, replace the drive. You may want to consider replacing it anyway for the safety of your data.
If you choose to keep using the problem drive, launch Disk Utility, select the volume, and run Repair Disk. If the volume can't be repaired, you'll have to erase it and start over. Don't do that unless you have at least two complete backups.

Toshiba Satellite A300-129 Crisis Recovery Mode Phoenix BIOS with USB drive

When flashing my BIOS back from v4.20 to a v3.90 I found on the net, everything went alright in windows, but as soon as I rebooted, the laptop showed the symptoms of a failed BIOS.
I'm now trying to repair the BIOS using the crisis recovery tool. I used the following procedure to create the USB stick and recover the BIOS
-Run the WINCRIS.Exe file in administrator and compatibility mode (Windows XP SP2)
-Select the USB drive (1GB Kingston), and format it with the tool
-Reinsert the drive and format again with the tool without restarting it to be sure that the disk is properly formatted
-Take the BL5S3D57.WPH file from the toshiba BIOS update and rename it to BIOS.WPH, and copy to the Crisdisk directory
-Copy the files BIOS.WPH (the one from toshiba I renamed), minidos.sys and winphlash16.exe to the drive in windows
-Take the drive out
-Plug battery out, plug AC out of laptop, hold the power button for a few seconds to make sure no remaining current is in the laptop
-Plug the USB Drive in
-Hold Fn+Esc in my case, this is the key combination where the laptop tries to read the USB drive the moment it boots up. It has something to do with enabling a boot block in the BIOS with that key combination.
-Plug AC in while still holding the F button
The F button does not nescessarily need to be held while plugging in AC, the laptop also tries to read from the drive if I hold it after plugging AC in, and before pushing the power button.
-Press the power button
I need to push the button twice, because the first time after plugging in AC the power button doesn't do a thing. When holding the power button for around 10 seconds after right after plugging AC in, the laptop boots sometimes, didn't find a pattern yet here.
The easy thing however is to just push the button 2 or 3 times, then it boots, and the booting procedure seems exactly the same as when holding the power button
-Wait for the LED to flash on the USB Drive. Very important: it seems to only flash ONCE for me, so it means it tries to access the drive, but I think it doesn't contain the right files or isn't formatted correctly. If I keep holding the F button while the laptop is on, the LED flashes once every 10-20 seconds.
From here on out the laptop is supposed to be reading the BIOS files from the USB drive, but apparently I'm doing something wrong. So here comes my question:
What could I be doing wrong in formatting the drive or writing the files to it?
Do I have the wrong CRISDISK? Is it normal that the files arent copied by CRISDISK to the USB Drive and that I have to do it myself?
Am I using the wrong WinPhlash? Or should I use the files that are supplied in the official BIOS rar from toshiba?
I have tried different versions of CRISDISK, different USB Drives (one 4GB would not be read by the broken laptop, and another 1GB would not be read by CRISDISK when trying to format the drive)
Tried different files on the USB Drive, tried bios.wph instead of capitals, tried BIOS.FD,...
I'm kind of running out of options here to try. Is there anyone who has experience with this recovery mode flashing that could tell me what I might be doing wrong? Or that has any suggestions on which other CRISDISK or toshiba updates to use?
Thanks anyways to people who read this and try to help!

> {quote:title=Xardas wrote:}{quote}
> Hi TwinCat,
>
> I think so to and that's a really good decision.
>
> From my own experience I can say that my authorized service provider works pretty fast and the technicians are friendly guys.
>
> I hope everything can be clarified as fast as possible! :)
I hope that Russian service provider will be as honest as the European one and won't solder something out as a souvenir :)
They said, it will take approximately a week.
Serviceman said that L30 has no built-in crisis recovery routine.
So I wasted money by buying an USB floppy disk drive and risked to burn something in my laptop by frequent powering it on and off (and may be burnt, will see).
The lesson I learnt is never flash BIOS if everything works and if even flash then not from Windows (btw. I flashed successfully my Satellite A300 from Windows without any problems).
Phoenix makes its BIOSes since 2001 with a crisis recovery boot block, but Toshiba locks this feature in many laptops, I think, not without a reason. Service providers want money too :)

Cannot boot from USB drive!!!!!!!!!!!!!

Hi
I have 3-4 120Gb 2.5inch drives which I clone my MacBook Pro to on rotation.
I have always been able to boot from these drives UNTIL NOW!
Suddenly I can no longer boot from them, the boot process starts and gets well through and then the drives all seem to just 'hang'.
The only significant change is that a local Apple support company upgraded my stock 120gb drive to a 160Gb drive.
Any ideas what the issue coiuld be?
Cheers.
Robin

Hi robster,
If the USB drive contains a valid OS you should be able to verify and repair the permissions on that drive, give that a try.
Also i suggest running DiskWarrior 4 on it.
The replaced internal drive should have no effect on this unless some settings got changed when the new OS got installed on it that now prevents the mac from being able to read your USB drive.
Does the USB drive need a driver ? if so is the latest version of that driver properly installed ?
If the USB drive checks out and all is OK maybe a re-install of the OS on your internal drive would help.
For now try disk utility and diskwarrior if you can that could narrow things down

USB drives not accessible until I join a domain

Hi,
I´ve been struggling with this problem for a loong time now.
Simply put, I want to use a usb drive in a laptop running Windows 7, and the device is detected correctly but Windows says that I need to format it. And in My Computer the drive has got a letter but when I doubleclick it it says it´s unaccessible. But if
I join the laptop to my customers AD it suddenly works as it should.
Since I discovered that, I just ignored it since all computers would join the domain, but now I need to install several laptops that´s not going to be ad-joined. So I need help solving this usb problem.
The customers uses laptops(Dall Latitude Exxx models) only and we install these using WDS. I think that all models of laptops have this issue and all usb drives. I haven´t been able to narrow it down to a certain model or anything else.
Everything else works as they should. The usb ports works fine using mouse and keyboard and similar. It´s only usb drives that are the problem.
I know that the hardware isn´t faulty since I can boot up using Linux and everything is fine, plus when I join the domain everything is also fine.
I have tried reinstalling chipset/usb drivers but nothing has helped. Also sfc /scannow doesn´t help.
Using gpedit.msc I set everything in "Users/Administrative/System/Access to removable storage" to inactive but this makes no difference.
I have not had this problem outside this customer.
Does anyone have any ideas? If so, please help!
Regards,
//Andreas..

Hi,
we should figure out what’s the difference between the two situations. I have the following thoughts to narrow down this cause:
Do you have preinstalled any security applications in your image?
Does this issue occur to all USB devices?
After you join the domain, can you log on with a local account to access USB devices?
You can get the security policies via rsop.msc as well.
If you have any feedback on our support, please click
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Alex Zhao
TechNet Community Support

Read only USB drive

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