I purchased (2) 12-tb: anyone knows why i get 10.91-tb for each? why are we short?

Hard drive manufacturers use base 10 for size. So 1 TB = 10**12 bytes. Your system uses base 2 for counting, so 1 TiB = 2**40 bytes. A base 2 TiB is larger than a base 10 TB. The actual name for a base 2 terabyte is a tebibyte, or TiB. A base 10 TB is TB or terabyte.

Can this be used as a normal hdd storage drive for a desktop pc?

Quick answer YES The more complete answer starts with 'WHY'? First, NAS rated disks are typically more expensive than desktop drives. They are built for different use expectations. One of the answers mentioned always leaving the system powered on. Most NAS setups are powered on and left on. They do not power cycle (and more importantly heat cycle) with any regularity. As such, the drives are built to operate in that environment. Another answer mentioned RPMs and many NAS drives spin at 5400/5900 RPMs. This means that the place on the platter where you file is stored takes longer to rotate around than it would on a typical desktop drive of 7200 RPM. Another answer mentioned vibration. The desktop is less vibration isolated (typically) than a NAS setup. Shop a 7200 (or faster) RPM disk or consider NVMe or SSD is the budget allows. You will not only likely save money initially but will have better performance in the longer term.

Is this drive smr if so i don't want it!

At least the IronWolf Pro drives are all CMR (=PMR), and not SMR. I think some of the smaller capacity non-Pro drives used to be SMR, but I think now even they are all CMR.

ASIN	B07SGGWYC1
Additional Features	Portable
Best Sellers Rank	#2,527 in Computers ( See Top 100 in Computers ) #12 in Internal Hard Drives
Brand	Seagate
Built-In Media	Seagate IronWolf 16TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage (ST16000VN001)
Cache Memory Installed Size	256
Color	Multicolor
Compatible Devices	Desktop
Connectivity Technology	SATA
Connectivity technology	SATA
Customer Reviews	4.6 out of 5 stars 2,115 Reviews
Data Transfer Rate	210 Megabits Per Second
Digital Storage Capacity	16 TB
Digital storage capacity	16 TB
Enclosure Material	Glass
Form Factor	3.5-inch
Global Trade Identification Number	00763649138038
Hard Disk Description	Mechanical Hard Disk
Hard Disk Form Factor	3.5 Inches
Hard Disk Interface	Serial ATA
Hard Disk Rotational Speed	7200 RPM
Hard disk form factor	3.5 Inches
Hard disk interface	Serial ATA
Hard-Drive Size	16 TB
Hardware Connectivity	SATA 6.0 Gb/s
Installation Type	Internal Hard Drive
Item Dimensions L x W x Thickness	14.7L x 10.2W x 2.6Th centimeters
Item Weight	1.7 Pounds
Manufacturer	Seagate
Media Speed	210.0
Model Name	ST16000VN001
Model Number	ST16000VNZ01
Number of Items	1
Read Speed	210 Megabytes Per Second
Special features	Portable
Specific Uses For Product	NAS Storage
UPC	763649138038
Unit Count	1 Count

Seagate IronWolf 16TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6GB/S 7200 RPM 256MB Cache for Raid Network Attached Storage, with Rescue Service (ST16000VN001)

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