usable and physical disk capacity by disk size

Usable and physical disk capacity by disk size You cannot use the nominal size of a disk in your aggregate and storage system capacity calculations. You must use either the usable capacity or the physical capacity as calculated by Data ONTAP. The following table lists the approximate physical and usable capacities for the disk sizes currently supported by Data ONTAP. The numbers shown are in Mebibytes (MiBs). This unit of measure is equivalent to 2 to the 20th power bytes. (MBs, in contrast, are 10 to the sixth power bytes.) The physical capacities listed in the table are approximations; actual physical disk capacities vary by disk manufacturer. The technical documentation for your disks contains the exact physical disk capacities. Disk size as described by manufacturer Physical capacity (MiBs, approximate) Usable capacity (MiBs) 100 GB SSD (X441A-R5) 95,396 95,146 100 GB SSD (X442A-R5) 84,796 84,574 200 GB SSD 190,782 190,532 800 GB SSD 763,097 762,847 300 GB SAS/FC 280,104 272,000 450 GB SAS/FC 420,156 418,000 500 GB SATA 423,946 423,111 600 GB SAS/FC 560,208 560,000 900 GB SAS 858,483 857,000 1.2 TB SAS 1,144,641 1,142,352 1 TB SATA 847,884 847,555 2 TB SATA 1,695,702 1,695,466 3 TB SATA 2,543,634 2,538,546 4 TB NL-SAS 3,815,447 3,807,816 More information Methods of calculating aggregate and system capacity You use the physical and usable capacity of the disks you employ in your storage systems to ensure that your storage architecture conforms to the overall system capacity limits and the size limits of your aggregates. Parent topic: Managing disks using Data ONTAP Related concepts How Data ONTAP reports drive types Copyright © 1994-2013, NetApp, Inc. All rights reserved. Part No. 215-07973_A0 May 2013 ©2014 NetApp Contact Us How to Buy Feedback Careers Legal Privacy Policy Subscriptions (RSS) | Usable and physical disk capacity by disk size https://library.netapp.com/ecmdocs/ECMP1196912/html/GUID-5D3F... 1 of 1 12/27/2014 6:59 AM

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Usable and Physical Disk Capacity by Disk Size

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Usable and physical disk capacity by disk size

You cannot use the nominal size of a disk in your aggregate and storage system capacity calculations. You must use either the usable capacity or the physical capacity as calculated by Data ONTAP.

The following table lists the approximate physical and usable capacities for the disk sizes currently supported by Data ONTAP. The numbers shown are in Mebibytes (MiBs). This unit of measure is equivalentto 2 to the 20th power bytes. (MBs, in contrast, are 10 to the sixth power bytes.)

The physical capacities listed in the table are approximations; actual physical disk capacities vary by disk manufacturer. The technical documentation for your disks contains the exact physical disk capacities.

Disk size as described by manufacturer Physical capacity (MiBs, approximate) Usable capacity (MiBs)

100 GB SSD (X441A-R5) 95,396 95,146

100 GB SSD (X442A-R5) 84,796 84,574

200 GB SSD 190,782 190,532

800 GB SSD 763,097 762,847

300 GB SAS/FC 280,104 272,000

450 GB SAS/FC 420,156 418,000

500 GB SATA 423,946 423,111

600 GB SAS/FC 560,208 560,000

900 GB SAS 858,483 857,000

1.2 TB SAS 1,144,641 1,142,352

1 TB SATA 847,884 847,555

2 TB SATA 1,695,702 1,695,466

3 TB SATA 2,543,634 2,538,546

4 TB NL-SAS 3,815,447 3,807,816

More information

Methods of calculating aggregate and system capacityYou use the physical and usable capacity of the disks you employ in your storage systems to ensure that your storage architecture conforms to the overall system capacity limits and the size limits of youraggregates.

Parent topic: Managing disks using Data ONTAP

Related conceptsHow Data ONTAP reports drive types

Part No. 215-07973_A0

May 2013

Usable and physical disk capacity by disk size https://library.netapp.com/ecmdocs/ECMP1196912/html/GUID-5D3F...

1 of 1 12/27/2014 6:59 AM

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