Storage
This section lists the storage options on your OptiPlex 7090 Micro.
Your computer supports one of the following configurations:
Table 14. Storage Matrix
Storage
1st 2.5-inch hard
drive
Single M.2
socket
2nd M.2
2280
socket
1st Bootable
Device
2.5-inch hard drive
Y
N
N
2.5-inch hard
drive
M.2 solid-state drive
N
Y
N
M.2 solid-state
drive
Dual M.2 solid-state drive
N
Y
Y
1st M.2 solid-
state drive
M.2 solid-state drive
2.5-inch hard drive/
solid-state drive
N
Y
N
M.2 solid-state
drive
M.2 Intel Optane
2.5-inch hard drive
Y
Y
N
2.5-inch hard
drive
Table 15. Storage specifications
Storage type
Interface type
Capacity
2.5-inch, 5400 RPM, hard-disk drive
SATA 3.0
Up to 2 TB
2.5-inch, 7200 RPM, hard-disk drive
SATA 3.0
Up to 1 TB
2.5-inch, 7200 RPM, FIPS Self
Encrypting Opal 2.0, hard-disk drive
SATA 3.0
Up to 500 GB
M.2 2230 solid-state drive
PCIe 3 Gen x4 NVMe, Class 35
Up to 512 GB
M.2 2280 solid-state drive
PCIe 3 Gen x4 NVMe, Class 40
Up to 2 TB
M.2 2280 solid-state drive
PCIe 4 Gen x4 NVMe, Class 40
Up to 2 TB
M.2 2280 Opal Self-Encrypting solid-
state drive
PCIe NVMe Gen3 x4, Class 40
Up to 1 TB
RAID (Redundant Array of Independent Disks)
For optimal performance when configuring drives as a RAID volume, Dell recommends drive models that are identical.
NOTE:
RAID is not supported on Intel Optane configurations.
RAID 0 (Striped, Performance) volumes benefit from higher performance when drives are matched because the data is split
across multiple drives: any I/O operations with block sizes larger than the stripe size splits the I/O and become constrained by
the slowest of the drives. For RAID 0 I/O operations where block sizes are smaller than the stripe size, whichever drive the
I/O operation targets determine the performance, which increases variability and results in inconsistent latencies. This variability
is particularly pronounced for write operations, and it can be problematic for applications that are latency sensitive. One such
example of this is any application that performs thousands of random writes per second in small block sizes.
RAID 1 (Mirrored, Data Protection) volumes benefit from higher performance when drives are matched because the data
is mirrored across multiple drives: all I/O operations must be performed identically to both drives, thus variations in drive
performance when the models are different, results in the I/O operations completing only as fast as the slowest drive. While
this does not suffer the variable latency issue in small random I/O operations as with RAID 0 across heterogeneous drives, the
impact is nonetheless large because the higher performing drive becomes limited in all I/O types. One of the worst examples of
22
Specifications of OptiPlex 7090 Micro
