Thanks for the reply, Grant. I should be more clear... By "hangs" I mean that applications become unresponsive and I am stuck with the spinning beach ball. This does not resolve it self and I can't even force-quit the applications, so I am forced to hard-power off by holding the power button.
This is not laggy behavior, the applications are completely hanging (but I have some Finder functions, like mouse movement).
Another drive-relayed problem that could cause this is Bad Blocks on the drive. The software and the hardware will retry many, many times in an attempt to get good data.
I would use Disk Utility to check the SMART status of the drive (select the make&model from the left column, observe the SMART Status at the bottom of the right hand side of the window). (Verify Disk) or (Repair Disk) while you are there.
Other possibilities, if you are up for it, are to monitor the situation with Activity Monitor. Open Activity Monitor and set the bottom display to System Memory pane. On the top, select All Processes, and sort the %-CPU column into descending order.
In the pie chart, you should see at least 1/6th of a pie of Green, possibly combined with Blue is also OK.
PageOuts should not be a large amount, if any.
In the %-CPU column, a process in double-digit CPU Utilization is worth looking at.
Thanks again, Grant. I have checked the SMART status with Disk Utility and also with Onyx. I have repaired disk permissions and checked the disk (No errors). I also cleared all the cashes I could with Onyx, and also the PRAM and SMC, as noted in my first post.
I have 8GB of RAM in this MBP, so I don't see page-outs anymore and often about half the RAM is free. Page outs and Swap Used = 0.
I've also been watching the console error log, but don't see too much that sticks out to me yet. (I had been looking at some errors of the form "kernel: IOSurface: buffer allocation size is zero" which some think is related to Flash, but I am not sure if this is related)
The Repair Disk function is Disk Utility (not to be confused with Repair Permissions) will check the directory for interal self-consistency. It does not check anything for Bad Blocks, and does not even look at anything outside the Directory area.
If you have Tech Tool Pro or Drive Genius, they can do a "Surface Scan" which will read every block looking for read errors. If you do eventually get an I/O Error, those are almost always caused by Bad Blocks.
Hard Drives are built with spare blocks held in reserve. You can get the drive to Substitute Spares for any blocks found Bad by Zero-ing the drive (not just erasing, this process takes a few hours) with Disk Utility or either of those others.
Drive Genius reports 0 bad blocks. So, I guess that narrows things down a tiny bit.
One other odd thing. All was well for a week or two, these crashes/hangs just started appearing this weekend. I wonder what else has changed. I'll be trying to isolate applications as well. I know I was mainly working in Chrome when the hang/crashes happened, but then again, I am usually just working in a browser these days.
When I am at my Mac, I leave the Activity Monitor application open with the setup I described to you above. It is in a window buried underneath what I am working on. If my Mac gets sluggish or unresponsive, I find I can often switch to the open Activity Monitoir window to see what the top CPU-hog is, or if all the memory has been used up.
You may also want to note the exact time of one of these events, and after it has settled down, look in the log to see if there are any messages from about that time. Console application is the thing you need for that -- it is already on your Mac.
If you are having a genuine kernel panic, it leaves a suicide note that can be read out using Console. Cut and paste the text here, and Readers will be happy to help you analyze it.
I just installed the 750xt also. It has been awesome for about a week now. This morning it started hanging on firefox. Almost 30-45 seconds to load each page. With the beach ball spinning I could not do anything except for swipe to other programs. Now seems to be working fine. I also heard a couple of platter chirps. I may RMA the drive if I can't find the solution. It was the first time I have put it to sleep overnight though without actually shutting it off. I think I have disk warrior I will try that on it and report what I find out.
I'm on my 2nd Momentus XT 750GB drive in my 17-inch, mid-2010 MacBook Pro. I use Drive Genius 3 with the "DrivePulse" monitoring option enabled.
The first Momentux XT I had worked well initially, I noticed snappy performance, but started reporting bad blocks, lots of them very shortly (within a few months) of installation. After a few days of continuing to detect bad blocks, Drive Genius gave a me a critical warning and recommended replacing the drive. Seagate took a couple of weeks to give me a replacement drive as their stock was low.
I cloned by data back onto the replacement drive but still had lots of beachballs, hangs and had to do several power-off reboots. I then decided it might be my data and legacy settings so I reformatted the new Momentus XT and installed Mountain Lion without doing any data migration, and started installing software and copying my data back over manually. Only 2 or 3 weeks after getting this warranty replacement, I'm getting the same bad block messages (lots of them) and now I have the RED CRITICAL warning from DrivePulse again which recommends that I replace the drive as soon as possible.
One or more of the following must be true:
- this drive is not ready for prime time
- this drive does not work well on Macs
- Seagate has very bad quality control
I don't know what the odds are of getting two drives this bad in a row.
I'm calling them back today to see what they can do for me but I don't know how many more times I can afford to play around with this drive
Hello all of you
I apologize for my bad english, I'm french...
So I read somewhere that the economy system pannel option "put the hard disk to sleep when possible" have to be unchecked when you are using a ssd drive, part of this hard drive is ssd (8go), and I have also freezings an data issues before I unchecked it. May it is helping.
Message was edited by: mmj4apple