Hard drive read/write problems

I have three external hard drives connected to my iMac that are always on with the computer. Just recently, I started having trouble with permissions. Every day I have to go into disk utility and click "verify disk" to be able to write to the drive, if I don't do that then I can only read the drive. It's the same with all three of them! This just started a couple of weeks ago. What is wrong?
Oh! My recollection recalls that a couple of weeks ago upon starting the iMac one morning, one of my hard drive's name, as well as a .iso file that I have on my desktop, were totally wacko. Full of numbers and characters, etc. I'm wondering if my HD problem is caused from this?
I desperately need some help!

if running "verify disk" helps at all it's definitely not a permissions problem. it's a file system problem. when system detects a serious file system problem when mounting an external drive it will mount it as a read only file system. run "repair disk", not "verify disk" using disk utility on all the drives involved. see if that helps. and are there any errors when you run it?

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G710 hard drive read/write speed

Hello,
I have a brand new Ideapad G710 with 1TB Serial ATA 2, 5400rpm with advertised speed of 3 Gb/s (= 384MB/s).
I am running Windows 7 ultimate x64 with SP1.
When I test hard drive read/write speed (I used CrystalDiskMark) I get results of about 100MB/s, which is 3-4 times slower than it should be.
I am not running any resource heavy applications (Resource monitor reports Disk I/O to be 0 most of the time in idle state). I have 3 partitions, each with 16-32GB paging file size and all are >90% empty. All partitions have been defragmented before testing.
Is this normal? Are there any lenovo drivers or utilities than I might be missing or that can slow/speed this?
Solved!
Go to Solution.

hi Daew,
Welcome to the Lenovo Forums.
The results that you got while running CrystalDiskMark is normal. The SATA 2 (3Gb/s) that you mentioned is actually the SATA interface support, not the actual read/write performance.
If you have a Seagate HDD (eg. ST10000LM024), check these specs
From the above specs, the unit has a cache that has a read/write max speed of 145 MB/s but there are environmental factors and power requirements to get this speed (eg. read/write speed on AC power is differente from battery power).
AFAIK, if this is the specs that is design for this drive, there's no way to speed it up.
If you're planning to upgrade in the future though, you can get an SSD for faster read/write.
Regards
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Make external hard drive read/write

Not quite sure if there is in the right section but oh well.
Here's the story:
SeaGate FreeAgent GoFlex Drive (1.5TB) (THE FOLLOWING INFO WAS TAKEN FROM ITS APPLICATION: ("SEAGATE DRIVE SETTINGS")
Drive Info
Model: FA GoFlex Desk
Firmware: 0D19
Volume Info
Format: Windows NT Filesystem
Capacity: 1397.26 GB
Available: 1224.35 GB
Used: 172.91 GB
Mount point: /Volumes/FreeAgent GoFlex Drive
So it seems to slow down my iMac (10.6.8), 2GHz Intel Core 2 Duo, 1.5GB 667 MHz DDR2 SDRAM (memory) (1st Generation 17 inch) a fair bit. Could this be because of the Format? I have no idea why it says that. When I first installed it, it asked what OS I'm going to use it for. Not quite sure if I chose both or just Mac. But those files have somehow dissappeared.
Now in Disk Utility...the RAID tab, Format says it is set to Mac OS Extended (Journaled) but then in the Erase tab it says Format: Windows NT Filesystem
Which format is it set to!?!?!?!?!?!?!
Now to the main point:
I also have a new 13" MacBook Pro. When I plug it into it, I only have Read Permissions. How do I make it have Write Permissions as well?
Sorry for the long essay...I hope you can help me. I might have two problems here.
1. Is the format correctly set up for my iMac?
2. How do I set it to have Read/Write permissions on different computers?
Thanks.

The Format is incorrect for Mac use, as you guessed. Go into Disk Utility again, highlight the external har drive in the left hamd column by clicking on it and select the "Erase" tab, up and over to the right. Then select the Format below that will be installed as "Mac OS Extended (Journeled)". THEN, OK the erasure. That should clear things up.
Note: your Windows PC will NO LONGER be able to read the external hard drive. It will be formatted for OS X use.
Hope this helps

[SOLVED] Log hard drive read/writes

Is it possible to monitor everytime a file on the hard drive is read from or written to and to add that information to a log?
Last edited by Chris Denton (2010-07-25 10:32:57)

Thanks. That seems to be working quite well.
One problem though, I notice I have to exclude /dev (otherwise it seems to get stuck in a loop like fukawi2 mentioned). This does raise a question though, I notice that it isn't actually accessing the physical disk when this happens, so I wonder, is there a way to tell it to only include events that occur on the disk?

Hard drive read/write question

Hi,
I purchased this mac pro(2008) with the stock seagate 320gb hard drive (model ST3320820AS_P) and I am interested to know what kind of read write numbers to expect from this drive.
I am having a tough time trying to find any numbers that aren't in reference to RAID setups, and became concerned that this drive might be working at peak performance due to firmware issues others are talking about.
(tangent - I would like to add more drives, but am on the fence for WD or seagate)
System Info
Xbench Version 1.3
System Version 10.5.2 (9C31)
Physical RAM 2048 MB
Model MacPro3,1
Drive Type ST3320820AS_P
Sequential 92.82
Uncached Write 70.70 43.41 MB/sec [4K blocks]
Uncached Write 110.35 62.43 MB/sec [256K blocks]
Uncached Read 82.04 24.01 MB/sec [4K blocks]
Uncached Read 129.89 65.28 MB/sec [256K blocks]
Random 33.16
Uncached Write 11.33 1.20 MB/sec [4K blocks]
Uncached Write 73.50 23.53 MB/sec [256K blocks]
Uncached Read 88.77 0.63 MB/sec [4K blocks]
Uncached Read 134.04 24.87 MB/sec [256K blocks]

http://www.barefeats.com/hard94.html
http://www.barefeats.com/quad07.html
http://www.barefeats.com/quad08.html
750GB WD SE16 $168 is hard to beat.
I saw some systems came with WD 320GB. Guess Apple is using both for now.

Hard drive read write speeds are too slow

I was having an issue with 17inch macbook pro. was getting 4.0mb/s read write speed tops. and smart status failure.
So i replaced the drive. The new drive is a 7200 RPM 500GB WD drive. I'm getting 12.0mb/s on top speed. Computer feels a little quicker but still slow overall.
I ran this test on a fresh install of snow leopard.
Is it just me or do those read/write speeds on the new drive still seem slow?
2007 17inch macbook pro with 2gigs of ram.

That does seem slow - on the other hand, what are you using to measure it?
My 1Tb 2.5" SATA drive performance shows as follows: http://grab.by/7zau
Xbench Stats: http://grab.by/7zau
Anything in System Profiler? http://grab.by/7zaR
Link Speed at 3 Gb?

I am moving from PC to Mac. My PC has two internal drives and I have a 3Tb external. What is best way to move the data from the internal drives to Mac and the best way to make the external drive read write without losing data

I am moving from PC to Mac. My PC has two internal drives and I have a 3Tb external. What is best way to move the data from the internal drives to Mac and the best way to make the external drive read write without losing data

Paragon even has non-destriuctive conversion utility if you do want to change drive.
Hard to imagine using 3TB that isn't NTFS. Mac uses GPT for default partition type as well as HFS+
www.paragon-software.com
Some general Apple Help www.apple.com/support/
Also,
Mac OS X Help
http://www.apple.com/support/macbasics/
Isolating Issues in Mac OS
http://support.apple.com/kb/TS1388
https://www.apple.com/support/osx/
https://www.apple.com/support/quickassist/
http://www.apple.com/support/mac101/help/
http://www.apple.com/support/mac101/tour/
Get Help with your Product
http://docs.info.apple.com/article.html?artnum=304725
Apple Mac App Store
https://discussions.apple.com/community/mac_app_store/using_mac_apple_store
How to Buy Mac OS X Mountain Lion/Lion
http://www.apple.com/osx/how-to-upgrade/
TimeMachine 101
https://support.apple.com/kb/HT1427
http://www.apple.com/support/timemachine
Mac OS X Community
https://discussions.apple.com/community/mac_os

I have an external hard drive from my time capsule that stopped working on me. I am attempting to access the data with a hard drive reader on my MAC. I am able to see the drive in disk utility and under system info USB. But I am unable to access the data.

I have an external hard drive from my time capsule that stopped working on me. I am attempting to access the data with a hard drive reader on my MAC. I am able to see the drive in disk utility and under system info USB. But I am unable to access the data and it does not show on the desktop when connected.

Ok if disk utility was able to verify the drive I doubt there is any problem.. are you trying to open a TM backup??
You need to mount the sparsebundle then check the actual info inside the bundle.
Don't use disk warrior.. if the disk has verified then unless you deliberately deleted files there is nothing that is going to do.
Pondini has a lot of stuff about getting access to the sparsebundle.
http://pondini.org/TM/17.html
But if you have copied info to the TC that is now gone.. and the disk is ok.. I am not sure.. the TC will not have deleted the files itself.

How can i format my external hard drive to write files from Mac without loosing the files that i alredy have on my external hard when i used it with windows?

How can i format my external hard drive to write files from Mac without loosing the files that i alredy have on my external hard when i used it with windows?
I have been using Windows to write files to my 1TB WD external hard drive and I do not want to format to loose the files capacity of around 500GB
Someone, Please help

Hi Allen,
Is there any way to store the back up to Mac and restore after formating?

I just got my first mac pro and I can't get the photos out of iPhotos moved on my hp external hard drive, I try export says unable, then I try to drag it from the desktop to the external hard drive but same problem. Thank you so much

I just got my first mac pro and I can't get the photos out of iPhotos and move them on my hp external hard drive, I try export says unable, then I try to drag it from the desktop to the external hard drive but same problem. what to do? Thank you so much

How is your external drive formatted? Use Disk Utility to check the volume format. If it is NTFS, you will need to reformat the HDD as exFAT in order to retain universal compatibility (RW to it on both Mac and Windows).

Does any one know if you purchased all your itunes songs off your home computer, but now the hard drive is having problems, and i cannot access my account. I'm using our mac pro and trying to sync my nano, but cannot find my playlist.Is there a way to?

I purchased all my Itunes off my home computer. My hard drive is having problems. Is there a way to use my Mac Pro to access my itunes account and find the songs that i purchased, and then transfer them to my Mac Pro so I can sync my nano?

I purchased all my Itunes off my home computer. My hard drive is having problems. Is there a way to use my Mac Pro to access my itunes account and find the songs that i purchased, and then transfer them to my Mac Pro so I can sync my nano?

My ipad3 will not turn on except to display the following[NAND] _FindFlashMediaAndKerpout:429 physical NAND block offset 16 [NAND] start:220 this 0xa015cc00 PROVIDER=0x9ed20080 flashMedia=0x9ed20080 [NAND] WMR_Start:149 Apple PPN NAND Driver, Read/Write

Help. My ipad will not boot up except to show the following message.
[NAND] _FindFlashMediaAndKerpout:429 physical NAND block offset 16
[NAND] start:220 this 0xa015cc00 PROVIDER=0x9ed20080 flashMedia=0x9ed20080
[NAND] WMR_Start:149 Apple PPN NAND Driver, Read/Write
Ideas? Help

Hi, my ipad 2 just got the same problem and after reading all relative post, finnally i figrue it out, that is no software issue at alll just hardware,
I did attemp replace the power button cable on my ipad so i must disconnect the back camera cable so there is my problem. Because the connect some how not exact in place, i took the camera out and the issue is gone. So, in your case, if you did try to replace anything look at them again or you just take them out one by one and reboot ipad until it work.
Hope this help
Binh

How do I use migration assistance with hard drive reader for dead macbook

Hi,
My old mac laptop died without warning.
I took it to the apple store and they suggested getting a hard drive reader and using that to transfer
across my files.
I've connected it up and have requested the migration assistant to transfer the files. Last night it
said it would 27 hours to transfer and now this morning it is saying 72 hours. This seems to
be a very long time - is it correct? Can I make it go faster or is there another way?
I've got a bit of music on there but nothing excessive. I do have about 15,000 photos though.
I'm not very techy so any assistance would be very helpful
Thanks
Sarah

Hi, that's far to long, unless maybe it's USB1.1 speed.
If USB2 or Firewire, I'd start ober & try Disk utility>Repair Disk on the external drive.

Why is external hard drive read-only on one Mac, but read/write on another?

I have a Seagate Backup Plus Portable Drive. I bought it to be compatible with both Windows and Mac, which it currently is. It works just fine on my PC and my MacBook. However, recently, I bought a MacBook Pro. The Seagate drive shows up as read only on the MacBook Pro, though it is read/write on my MacBook. It's formatted NTFS, yes, but it already works on my MacBook. What's going on here?

Nope, one of the selling points of the drive was that it came ready to work with both Mac and Windows (the product description says there is an NTFS drive installed for use on Mac). No hacking or installing on my part.
But I think I figured it out. Apparentely, Mavericks comes installed with something that does not allow it to write NTFS no matter what (well, unless you go through a whole bunch of technical stuff to rewrite the software). My old MacBook was Leopard.
I'll just reformat the external hard drive for Mac, and if I ever need to use it on a Windows, I'll install HFS+ Explorer on the Windows. Oh well.

Can only read external hard drive, not write to

Hi
I have a Mac Book Pro and a 60GB external Hard Drive which I use to transfer files between my Win PC (!!) and my Mac. transferring files from PC to Mac is fine using the HDD but when I try to copy files from my Mac to the HDD it says I cannot write to the drive as it is read only. How do i make it writable as well as readable. Its formatted as Windows NT Filesystem if that helps.

mp_photo wrote:
Its formatted as Windows NT Filesystem if that helps.
Hi,
that is the culprit.
Mac OSX is only capable of reading from NTFS drives but can not write to them.
Possible solutions:
Reformat the external drive to FAT32 (using Disk Utility and 'MS-DOS'),
but be aware of the the size limit of 4GB for a single file
use MacFuse: http://code.google.com/p/macfuse/
Caution: reformatting the drive will delete all files on it, so make a backup before.
Regards
Stefan

Hard drive read/write problems

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