New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus • Advice and insight from world-class Apple enthusiasts • Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

Momentus XT Issue-Please Help


Post Reply New Thread Subscribe

 
Thread Tools
athensga80

 
Member Since: Nov 27, 2010
Posts: 3
athensga80 is on a distinguished road

athensga80 is offline
I recently installed a 500gb Momentus XT hybrid drive in my MBP. I have noticed improvements in loading of applications and in bootup time. However, when I recently ran Xbench it gave me these results for the disk test portion.

Disk Test 49.48
Sequential 113.92
Uncached Write 126.54 77.70 MB/sec 4K blocks
Uncached Write 162.33 91.85 MB/sec 256K blocks
Uncached Read 64.15 18.78 MB/sec 4K blocks
Uncached Read 183.06 92.00 MB/sec 256K blocks
Random 31.61
Uncached Write 9.37 0.99 MB/sec 4K blocks
Uncached Write 274.42 87.85 MB/sec 256K blocks
Uncached Read 99.44 0.70 MB/sec 4K blocks
Uncached Read 163.72 30.38 MB/sec 256K blocks

All of the tests using 4k blocks are giving bad results. Does anyone know whether this is software or hardware related? Any tips on how to fix this. In addition, I recently installed 8gb of ram in the computer, but I made sure not to knock the SATA connector. Thanks for the help.
QUOTE Thanks
s2odin

 
s2odin's Avatar
 
Member Since: Oct 23, 2010
Posts: 836
s2odin is a jewel in the roughs2odin is a jewel in the rough
Mac Specs: C2D 2.26 | 500GB Seagate Momentus | 2GB 1066 (soon to be 8)

s2odin is offline
4k blocks give issues to even SSD's under random r/w speeds.

USAF E-2. 1C6X1 - Space Systems Operations. 19 days until BMT.
Upgrade your MBP HD
Tritton AXPro FS
QUOTE Thanks
athensga80

 
Member Since: Nov 27, 2010
Posts: 3
athensga80 is on a distinguished road

athensga80 is offline
I understood that when I bought the drive, but still, the performance is 10x worse than it was with the stock 250gb drive. Any suggestions for fixing this or could it be a defective drive? The larger block r/w are good, so I don't think it is defective, but I'm open to opinions.
QUOTE Thanks
iggibar

 
iggibar's Avatar
 
Member Since: Apr 20, 2009
Location: C-Town
Posts: 4,064
iggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to behold
Mac Specs: Mac Pro 4.1 15" MBP. 13" MBP. 17" PB. Power Mac G5. iPhone 5s 64gb

iggibar is offline
You have a drive that requires multiple boots and numerous uses out of apps so that it can learn how you use your drive. Also, speeds fluctuate A LOT. The advertised speeds aren't read/write speeds that you see 100% of the time, they are just peek speeds, which are similar to an ssd showing 275mb/s but only 60-100mb/s random speeds.


1 thing. Did you restore a the OS or did you put a fresh one on? If you had a fragmented drive previous to restoration, your new drive will be just as fragmented, or possibly worse with new caching.

“If you are distressed by anything external, the pain is not due to the thing itself but to your own estimate of it; and this you have the power to revoke at any moment.” Marcus Aurelius
QUOTE Thanks
athensga80

 
Member Since: Nov 27, 2010
Posts: 3
athensga80 is on a distinguished road

athensga80 is offline
I cloned my old drive w/CCC to the XT in an external enclosure. I have had the drive installed for several months, I only recently ran the xbench test. After seeing the results I ran Techtool and Disk Utility and found that the volume structure was corrupt. I booted from the Mac OS X install DVD and successfully repaired the drive. However, I am still getting disappointing Xbench results. Would it be a good idea to format and reinstall OS X from my Time Machine backup? Or should I just ignore the results and not worry about them? As I said, it is not noticeable in everyday use. In addition, does anyone know of any other performance test software I could use. When I checked on the Xbench website other MBP users w/ a XT installed had awful 4k r/w block scores. Perhaps it is simply a problem between XBench's methods and the Momentus XT.
QUOTE Thanks
iggibar

 
iggibar's Avatar
 
Member Since: Apr 20, 2009
Location: C-Town
Posts: 4,064
iggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to beholdiggibar is a splendid one to behold
Mac Specs: Mac Pro 4.1 15" MBP. 13" MBP. 17" PB. Power Mac G5. iPhone 5s 64gb

iggibar is offline
I did the test with all my hd's and my OCZ ssd. The only one that was faster was the OWC ssd. The stock 250gb that came with my mbp had the slowest times(5400rpm). The other stock hd's running at 7krpm had relatively faster read/write times than the 250gb, but were slower than the XT.

The only thing I can think of is that maybe you have a lot of misplaced files causing slow test results.

When I first installed my XT, I needed some of the programs and documents asap the way I left them, so I backed everything up. After I was done with that though, I did a fresh install. I got full start-up to the desktop in 29-33 seconds(completely loaded). With the 250gb, it was around 49 seconds. The OWC ssd starts up in 19-21 seconds consistently.

Do you get bootup times around 30 seconds with it?

“If you are distressed by anything external, the pain is not due to the thing itself but to your own estimate of it; and this you have the power to revoke at any moment.” Marcus Aurelius
QUOTE Thanks
harryb2448

 
harryb2448's Avatar
 
Member Since: Nov 28, 2007
Location: Nambucca Heads Australia
Posts: 17,454
harryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond repute
Mac Specs: iMac i5 2.7GHz OS X.9.4 and OS X.10

harryb2448 is offline
Personally great believer in registered SuperDUper for backups, but when cloning a drive use Disk Utility's own, and free, Restore program. Go into Disk Utility and hit the restore key. Simply select the drive to be copied, and the target drive and away you go. Perfect every time.

Moderator chscag and I have discussed previously problems of cloning a boot drive to a new drive. Do a search of the threads.
QUOTE Thanks

Post Reply New Thread Subscribe


« processor update?? | new replacement keyboard/trackpad doesn't work »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
Continuous Kernel Panic Issue Zilch Apple Notebooks 8 10-04-2010 06:17 AM
Disk Error, then FOLDER WITH QUESTION MARK ISSUE. rohit.dhamija Apple Notebooks 1 09-14-2010 01:52 PM
First Keystroke issue on an iMac 24" (White) MacRoy OS X - Operating System 0 07-20-2008 05:34 AM
Verifying Hard Drive Issue sdgstudios Apple Desktops 3 06-25-2008 02:32 PM
Issue with Mac Safari browser harryindia OS X - Apps and Games 4 11-21-2006 06:31 PM

All times are GMT -4. The time now is 10:35 AM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?