What is the Read/Write speed for a 250gb Serial ATA hard drive?

Hello. I've been having some problems via my Mac (Kernel panic at start up) and is thinking wether or not it is the hard drive.
Does anyone know what the Write speed is for the specified hard drive. I'm currently getting about 5 mbps and that feels a bit slow
I'm on a Macbook Pro mid 2009 model.
Thanks in advance
Ashley.

I haven't got the logs. I had to reinstall everything in order to get it to start up (Couldn't find ACPI?)
And I'm only asking because it seems like my laptop HD is running slow. Is it normally about 5mbps for a 5400rpm HDD?

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I'm looking for the read/write speeds for my Mac's.

I'm looking for read/write speeds for my Macs, but I can't find consistent data. Does anyone know the speeds or know where I can look? I have three computers:
iMac late 2013 Fusion/3TB i7
iMac late 2009 1TB i7
Macbook Air 256GB i5
Thanks,

I think the feature is called Voice Over, and I think it's now compatible with Reader:
http://support.apple.com/kb/HT3598?viewlocale=en_US&locale=en_US

Read/Write speeds with Airport Extreme and USB Hard Drives

Anybody know how fast the read/write speeds are with a USB hard drive and the Airport Extreme Base Station?
My Setup
I have a 17 MBP (2010) and a 13 MBP (2011) - no SSD's
MBP generally connect via 802.11n 5Ghz with a very strong signal
Gigabit connection on a Windows Desktop
I have a variety of external drives (7200, 5400, Drobo) at varying capacity (320GB, 2TB, 5.6TB)
Goals
Backup: Time machine
Backup: File copies of pictures and home videos (greater than 1GB files)
Backup: Crashplan
File sharing: Aperture libraries--not sure if that is possible or practical. That is something that I need to research further...but on the off chance people have experience with it.
Thanks!

ishjen wrote:
Anybody know how fast the read/write speeds are with a USB hard drive and the Airport Extreme Base Station?
Welcome to Apple's discussion groups.
Apple's AirPort base stations aren't known for fast file serving, but for most purposed they're fast enough.
I can't comment specifically on your Aperture plan, but with some software it's important to avoid simultaneous access by more than one user.

What are the read write speeds of the new Mac Pro's storage options?

The subject line says it all.. I would hate to go for the 1TB option only to have it be slower than the 512GB.
Thanks
Dimitri Katsaros

Samsung starts mass producing PCIe SSDs with 1400MB/s read speeds By Matthew Humphries Jun. 17, 2013 11:27 am
When the new MacBook Air got the teardown treatment last week, there wasn’t much different from the previous model apart from the addition of a Haswell processor, bigger battery, dual microphones, and a new SSD.
In fact, it’s that SSD that was the most unexpected new component, as it saw Apple switch from a SATA to a PCIe-connected storage solution.
That faster storage solution isn’t going to be limited to MacBook Airs , though. The PCIe SSD was supplied to Apple by Samsung, and Samsung has today announced it is already mass producing the drives.
The new drive is known as the XP941 and Samsung will offer it in 128GB, 256GB, and 512GB configurations. It achieves read speeds of 1,400MB/s, which clocks it at 2.5x faster than a SATA SSD. It also only weighs 6 grams and measures 80 x 22mm. Samsung claims it only takes up a 7th of the space occupied by a typical 2.5-inch SSD.
With Samsung being the only company currently boasting mass production of such drives, supplies may be stretched depending on how many manufacturers decide to use them.
Apple is surely already taking a large chunk of the stock every month already, leaving everyone else to fight over the rest.
===========
It depends a lot on the pattern, and also what type of file, what any particular benchmark too. Intech SpeedTools gives you more flexability in read and write file tests - SSD writes are highly variable, it is the high IOPS and high reads that boost a system so much.
People that were using PCIe SSD 6G and multiple SSDs have found that Aperture, Lightroom, Photoshop scratch AND having the system on their SSD run smoothly, fast, even faster than those "olde" SATA3 6G controllers they were using to get 800-900MB/sec.
I just don't think you looked on Barefeats or Googled long enough to find some reviews, and there have been more - the large Anandtech review of the nMP is a good start.
http://macperformanceguide.com/MacPro2013.html
Lightroom Perspective:
http://tony-hart.com/blog/essays/2014/01/mac-pro-a-lightroom-perspective/
Aperture, Lightroom and Capture One
http://forums.macrumors.com/showthread.php?t=1542274
Unboxed and Tested
http://forums.macrumors.com/showthread.php?t=1692536
nMP review from a 3,1 owner
http://forums.macrumors.com/showthread.php?t=1695308
Anandtech's Big review
http://www.anandtech.com/show/7603/mac-pro-review-late-2013

Typical read/write speeds for Apple Raid card

I have 3 1TB Samsung F3 Spinpoint drives that I am using in Bays 2-4, coupled with Apple's Raid card. Before striping the drives in a raid configuration, I used Disk Utility to write zeroes to each of the disks individually, which took about 3 hours each (this works out to about 100 MB/s, which makes sense to me). However, the third drive, in Bay 2, took much longer than normal to zero (over 12 hours), so I suspected a defective drive. When I striped them using the Raid Utility program, I was able to create a volume and proceeded to test it using QuickBench. Extended Read tests in the 20-100 MB range were only about 30 MB/s. Is this normal? Shortly thereafter, my Raid Utility program encountered an error with the hard drive in Bay 4, which wasn't the same disk I had problems formatting. I took out that drive, removed the volume and raid, and set up Raid Stripe 0 with 2 disks. I am still encountering Extended Reads of about 30 MB/s, no matter if I have cache enabled or not. Any help would be appreciated. Thanks!

I suppose I could select a block size other than 32 kB when I set up the raid, but I wanted to save time to see if any posters have other suggestions.
I know that the windows version of the drive makers utilities are recommended for surface scanning and mapping.
In the case of weak sectors, this is about all you can do.
I may be wrong, but I think Apple has a clause in their manual so that people will buy hard drives from them instead of 3rd party manufacturers.
I am sure that is part of it.
There is also the onboard ROM of the hard drive.
Problem with Apple supplied cards of any kind, is that they have a history of ROM manipulation.
Whether it be crippling (as compared to 3rd party equivalent), or keys to limit performance or compatibility, it is always a question.
I know I am not the only one who has bought their own hard drives for a Mac Pro RAID setup.
I'm sure you are not, and was just "crossing t's and dotting i's" in asking....
BTW, I have 132 MB/s Read, 121 MB/s Write for 2MB-10MB blocks, avg 128 MB/s and 110 MB/s for 10MB-100MB blocks on a 2 drive RAID with WD drives in a 100MHz FSB system.

[Solved]Variable read/write speed with WD Passport 1 TB external drive

I have this drive connected to my Arch Linux box. Whenever I transfer large files (I use it to backup) the write speed drops from 30M/s to sometimes a few KB/s and then speeds up again ! This drive is connected via an USB 2.0 port with a specific cable which is 2.0 at one end (to connect to my motherboard) and 3.0 at the other end (to connect to the drive). Could this be related to the kernel SES driver which is used (buffer problem maybe)?
This speed problem is that serious that backups take very long and become almost not feasable.
Thanks in advance
Last edited by Strider (2014-02-02 21:00:54)

Jason,
this drive has 3 use cases (my PC is dual boot Arch / Windows Vista) :
1) Backup my PC linux box using a rsync front end (luckybackup) here source and target are ext4 in target always and source is either ext4 or lvm on raid.
2) Backup of my PC Windows Vista using an own written script which uses ntfsclone where source and target are ntfs.
3) Backup of my Windows 7 laptop
The problem is that I have performance issues in scenario's 1 & 2 (but not always) and never in case 3. I think this might finally be hardware related ...
Just before writing this post I connected the drive and it didn't even appear in my file manager (nemo under cinnamon 2.0). So I ran a journalctl and here is the outcome :
Feb 02 09:55:33 Megatron kernel: usb 2-4: new high-speed USB device number 3 using ehci-pci
Feb 02 09:55:33 Megatron kernel: usb 2-4: new high-speed USB device number 4 using ehci-pci
Feb 02 09:55:33 Megatron mtp-probe[911]: checking bus 2, device 4: "/sys/devices/pci0000:00/0000:00:13.2/usb2/2-4"
Feb 02 09:55:33 Megatron mtp-probe[911]: bus: 2, device: 4 was not an MTP device
Feb 02 09:55:33 Megatron kernel: usb-storage 2-4:1.0: USB Mass Storage device detected
Feb 02 09:55:33 Megatron kernel: scsi12 : usb-storage 2-4:1.0
Feb 02 09:55:33 Megatron kernel: usbcore: registered new interface driver usb-storage
Feb 02 09:55:34 Megatron kernel: scsi 12:0:0:0: Direct-Access WD My Passport 07A8 1049 PQ: 0 ANSI: 6
Feb 02 09:55:34 Megatron kernel: scsi 12:0:0:1: Enclosure WD SES Device 1049 PQ: 0 ANSI: 6
Feb 02 09:55:34 Megatron kernel: sd 12:0:0:0: [sde] Spinning up disk...
Feb 02 09:56:04 Megatron systemd-udevd[186]: worker [926] /devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:1 timeout; kill it
Feb 02 09:56:04 Megatron systemd-udevd[186]: seq 1876 '/devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:1' killed
Feb 02 09:56:06 Megatron kernel: usb 2-4: reset high-speed USB device number 4 using ehci-pci
Feb 02 09:56:06 Megatron kernel: .ready
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] 1953458176 512-byte logical blocks: (1.00 TB/931 GiB)
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Write Protect is off
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Mode Sense: 53 00 10 08
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] No Caching mode page found
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Assuming drive cache: write through
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] No Caching mode page found
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Assuming drive cache: write through
Feb 02 09:56:06 Megatron kernel: sde: sde1 sde2
Feb 02 09:56:06 Megatron kernel: ses 12:0:0:1: Attached Enclosure device
Feb 02 09:56:06 Megatron systemd-udevd[186]: worker [926] terminated by signal 9 (Killed)
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] No Caching mode page found
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Assuming drive cache: write through
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Attached SCSI disk
Feb 02 09:56:07 Megatron org.gtk.Private.UDisks2VolumeMonitor[592]: ### debug: emit_signal: 0x175a210
Feb 02 09:56:37 Megatron systemd-udevd[186]: worker [908] /devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde1 timeout; kill it
Feb 02 09:56:37 Megatron systemd-udevd[186]: seq 1884 '/devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde1' killed
Feb 02 09:56:37 Megatron systemd-udevd[186]: worker [928] /devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde2 timeout; kill it
Feb 02 09:56:37 Megatron systemd-udevd[186]: seq 1885 '/devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde2' killed
Feb 02 09:56:37 Megatron kernel: usb 2-4: reset high-speed USB device number 4 using ehci-pci
Feb 02 09:56:38 Megatron systemd-udevd[186]: worker [908] terminated by signal 9 (Killed)
Feb 02 09:56:38 Megatron systemd-udevd[186]: worker [928] terminated by signal 9 (Killed)
Something also worth knowing : the drive is know for being a heavy power drain on the usb 2.0 port (it does not have an external power connection and gets its power only via usb) . So I bought a specific cable with 3.0 at one end and 2 usb 2.0 at the other end : one for transferring data and one for power.

On a 500G MBP running Lion what's the best size to partition a 2T WD external hard drive to for Time Machine? Thankse

Just picked up a 2T WD external HD for my new MBPro with 500 G drive. Looking to use part of the external drive for Time MAchine. Not sur if I should designate 1T of it or 750G. I'm running Lion. What's the best way to format the external drive. Disk Utility?
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Ask in Lion: TimeMachine / MacBook Pro even - this is workstation territory
I would not use the same drive for data and for backups.
If I had to, I'd make a partition large enough to boot your Mac from though, whether 50-500GB to clone your system.
You should still be able to use Lion's Recovery boot mode.
I don't think there really is much choice in what to format with, unless you want to spend over $100.

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I plan on installing a larger Hard Drive..the physical part is simple..but what are the steps after you close it up and hit the power button? Is there softwre on the mother board that will start the unit running??

A new Hard drive will not be Mac-formatted, so you will have to do that first. A copy of Disk Utility to do the job is also on the 10.6 Installer/Utilities DVD.
Boot to the installer DVD, but do not Install. Answer only the "what language" question, and wait a quarter minute for the menuBar to be drawn. Choose Disk Utility from the Utilities menu that appears.
Select the Hardware_name of the new Drive. Partition, one partition, ( Options ), GUID partition table. Name the partition: MacIntosh HD and choose Format: Mac OS X Extended (journaled). It will complete in a minute or two, as it only rewrite the Directory area.
If you wish to shake out your drive, you can erase it and Security Erase, Zero all data, one pass. But this takes HOURS.

What's the easiest way to back up and restore my hard drive to a new HD

I'm going to upgrade my hard drive to a larger one on my MacBook. I have an external backup drive. What is the easiest way to save all my data (documents, emails, etc) and applications and restore them to the new hard drive in my MacBook? I have Leopard OS.
I've read on the forum everything from using Time Machine to the Disk Utility. I have been backing up everything to my external HD using Time Machine.
Can you point me to a step by step process.

I don't use TM, so here's my method that I've used many times for the same thing you are doing.
How to Clone Using Restore Option of Disk Utility
1. Open Disk Utility from the Utilities folder.
2. Select the backup or destination volume from the left side list.
3. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button. This step can be skipped if the destination has already been freshly erased.
4. Click on the Restore tab in the DU main window.
5. Select the backup or destination volume from the left side list and drag it to the Destination entry field.
6. Select the startup or source volume from the left side list and drag it to the Source entry field.
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Now, boot from the clone to be sure it works correctly by opening Startup Disk, selecting the external volume, then clicking the Restart button. If all is well the computer will boot from the external drive. Now shut down the computer and disconnect the external drive. Disconnect the AC adapter and remove the battery. Install the new hard drive. Once you've completed the installation connect the external drive and restart the computer.
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Extended Hard Drive Preparation
1. Open Disk Utility in your Utilities folder. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger or Leopard.)
2. After DU loads select your new hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Click on the Options button, set the partition scheme to GUID (only required for Intel Macs) then click on the OK button. Set the number of partitions from the dropdown menu (use 1 partition unless you wish to make more.) Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the volume(s) mount on the Desktop.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process will take 30 minutes to an hour or more depending upon the drive size.
Steps 4-6 are optional but recommended for a drive that has never been formatted before, if the format type is not Mac OS Extended, if the partition scheme has been changed, or if a different operating system (not OS X) has been installed on the drive.
After formatting is completed use DU to clone the external drive's system back to the new internal drive. The external drive becomes the Source and the internal drive will be the Destination.

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I have 10.6.8 on MacBook Pro. When I try to eject my 1TB external hard drive, I get the error message “one or more programs may be using it.” When I tried to eject it from Utilities, it said that “it could not be unmounted.” What’s the safest way to unmount it? Can I just shut down my laptop and then turn off the external hard drive after the computer is shut down?

Shutting down should always work, because all programs are terminated and they stop using the disk. But you often don't have to go that far.
Logging out should also always work, for the same reasons, although the only programs that get terminated are the ones in the user account that is logged out.
If you don't want to log out, quit any apps you are no longer using.
Mac Mail is notorious for hanging onto files that have been attached to emails. If you attached a file from an external disk, Mail might not have let it go. Quitting Mail solves this problem.
The Finder sometimes doesn't let go of files either, like after you do a QuickLook on a file. Normally you can't quit the Finder except using Activity Monitor, so I add the Quit command using a utility like TinkerTool because quitting the Finder definitely helps with some problems.
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What's the best way to move a project from my hard drive to someone else's hard drive?

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Assuming the project is not under any form of source control, simply copy the source to a shared drive and let your colleague know when it is available. Just make sure they copy it to a local drive before they edit anything.
The RoboColum(n)
@robocolumn
Colum McAndrew

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I backup regularly to data DVD's without a problem.

What's the most recent opinion about Time Machine backups to Hard Drives connected to the USB port on the Airport Extreme Base Station (5th generation)?

I have been searching the Apple communities and Internet for a final answer. I just bought an Airport Extreme Base Station (5th generation) and LaCie d2 quadra 1TB external drive as a replacement for TWO failed Time Capsules, neither of which Apple would replace due to failed power supplies. I formatted the 1TB drive using Disk Utility (Mac OS extended (journaled)) from my MacBook Pro, and then plugged into the Airport Extreme Base Station USB port. The Airport Extreme Base Station see the Hard Drive, and my MacBook Pro sees the Hard Drive in my finder under shared resources. Time Machine, however, does not see the drive. Is there a solution for this problem? If Time Machine will not work, is there another software product out there that will work, like Carbon Copy. Having to plug the backup drive into the USB port of your laptop every evening kind of defeats the purpose of having a laptop. Any suggestions would be appreciated.

Keeping in mind that this is not supported by Apple, I have been successful at doing the following:
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2) Plug drive via USB to AEBS
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I backup regularly to data DVD's without a problem.

What is the Read/Write speed for a 250gb Serial ATA hard drive?

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