Disk Response time for High Sierra

[Eagle36]

Is there any way to see what the Disk Response time is for an iMac running High Sierra or a reliable third party utility for viewing disk response as well as analyze disk? I am looking into an iMac running slow and after looking into a few things I am suspecting the disk is having problems that don't show up in apple disk utility.


Thanks

 

[organicCPU]

For analyzing disks, you could try:
https://binaryfruit.com
or
https://www.smartmontools.org

There is a command in terminal called time (man time). This outputs the amount of time for a certain action, but I don't think that it can be easily utilized for disk drive latency checking.

Is it a HDD or SSD? How old is it? What iMac model?
Asking this, because it could be easier to exchange the drive than analyzing it. Making a backup as long as it's possible is always a good idea.

 

[HDFan]

Is there any way to see what the Disk Response time is for an iMac running High Sierra or a reliable third party utility for viewing disk response as well as analyze disk? I am looking into an iMac running slow and after looking into a few things I am suspecting the disk is having problems that don't show up in apple disk utility.

You can run the BlackMagic disk test to get an idea of your disk performance. I don't think it does random access tests, but it is a start.

There are a lot of things than can cause slowness. If the BlackMagic numbers are good, does Activity Monitor show anything unusual? Do you have the same problems logged in as a test user?

 

[simonsi]

2nd to start with Blackmagic. Then run Etrecheck to see if you have anything of an incompatible, failed daemon etc ilk