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Managing Disks - Certify, Verify, Initialize
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I recently purchased a Seagate EXOS 18TB HDD and immediately set to work having SoftRAID certify it on a 5,1 Mac Pro with only a Boot SSD inside and NOT connected to the internet.
Using Activity Monitor's Disk tab to monitor the drives progress I'm observing something weird. Both SoftRAID and System Information report the drive as 18TB (18,000,207,937,536 bytes), and yet when SoftRAID had completed it's first write pass, Activity Monitor only reported 16.22TB written. Same again when the first Read pass completed (16.39TB read).
I am aware of the difference between Decimal and Binary notation for hard drive capacities, but that doesn't seem to account for the full difference (If my math is right, the binary of 18TB in Base 10 should be around 17,167.5 TB in Base 2). Does this mean that the drive is misrepresenting it's true capacity? Or are there sectors which SoftRAID skips during Certification but the manufacturer reports as "available" sectors?
Posted : 10/12/2022 12:33 pm
This is interesting. I wonder if Activity Monitor is the one that is inaccurate. I will have to investigate this.
Nothing to worry about, somewhere, there is a math error, or lack of counting something or other.
Posted : 10/12/2022 2:05 pm
hoota reacted
