Symmetrix 8000/DMX/DMX-2 Series

Enginuity Code: 5567, 5568, 5669, 5670, 5671

Includes EMC Symmetrix 8130, 8230, 8430, 8530, 8730, 8830, DMX1000, DMX2000, DMX3000 and various different configurations within those models.

GB = Cylinders * 15 * 64 * 512 / 1024 / 1024 / 1024

eg: 6140 Cylinder devices equates to 2.81 GB of usable data

6140 * 15 * 64 * 512 / 1024 / 1024 / 1024 = 2.81 GB

Cylinders = GB / 15 / 64 / 512 * 1024 * 1024 * 1024

Where

15 = tracks per cylinder

64 = blocks per track

512 = bytes per block

1024 = conversions of bytes to kb to mb to gb.

.

Symmetrix DMX-3/DMX-4 Series

Enginuity Code: 5771, 5772, 5773

Includes EMC Symmetrix DMX-3, DMX-4 and various different configurations within those models.

GB = Cylinders * 15 * 128 * 512 / 1024 / 1024 / 1024

Eg: 65520 Cylinder device equates to 59.97 GB of usable data

65540 * 15 * 128 * 512 / 1024 / 1024 / 1024 = 59.97 GB

Cylinders = GB / 15 / 128 / 512 * 1024 * 1024 * 1024

15 = tracks per cylinder

128 = blocks per track

512 = bytes per block

1024 = conversions of bytes to kb to mb to gb

.

Symmetrix V-Max

Enginuity Code: 5874

Includes EMC Symmetrix V-Max and various different configurations within this model.

GB = Cylinders * 15 * 128 * 512 / 1024 / 1024 / 1024

Eg: 262668 Cylinder device equates to 240.47 GB of usable data

262668 * 15 * 128 * 512 / 1024 / 1024 / 1024 = 240.47 GB

Cylinders = GB / 15 / 128 / 512 * 1024 * 1024 * 1024

15 = tracks per cylinder

128 = blocks per track

512 = bytes per block

8 bytes = 520-512 used for T10-DIF

1024 = conversions of bytes to kb to mb to gb

Drive format on a V-Max is 520 bytes, out of which 8 bytes are used for T10-DIF ( A post on DMX-4 and V-Max differences).