The R740xd and R740xd2 are 2U dense storage chassis for safety and security workloads. They support single or dual processors. The R740xd chassis supports 16 x 3.5" hard drives and the R740xd2 supports 26 x 3.5" hard drives. They use Uses a single disk controller for both Boot and Storage capacity.
The test results are based on a model in which the constant-bandwidth safety and security video traffic remained unaffected during select storage failure scenarios, such as disk rebuild, failing processors, and failing network paths.
We performed all tests with disk drive failures, node failures, storage process failures, or NIC failures to ensure a worst-case scenario for all sizing parameters.
Dell Technologies recommends using RAID 6 with local storage to accommodate the disk rebuild duration. For example, in the Dell EMC Safety & Security Lab , a disk rebuild in a 16 x 10 TB disk system takes at least 36 hours to complete when 10TB of data and 37.5 MB/s (300 Mb/s) of write are in place.
PowerEdge R740xd2 with local storage
The following table provides bandwidth-sizing guidelines with local storage based on our test results.
Specification | R740xd-2 | ||
XProtect Version | 2018 | 2019 | |
CPU | Intel (R) Xeon(R) Gold 6126 CPU @ 2.20GHz | Intel (R) Xeon (R) Gold 5120 CPU @ .20GHz | |
RAM GB | 128 | 256 | |
Drive type | NL-SAS | NL-SAS | |
NIC speed | 2X10 Gb | 2X10 Gb | |
Storage Controller | H730P | H730P | |
No of drives X Drive size TB | 26 X 10 TB | 22 X 10 TB | |
RAID | 6 | 6 | |
HotSpare | 1 | 1 | |
Host Operating system | Windows 2012 data center | ESXi with Windows Server 2016 | ESXi with Windows Server 2016 |
No of Instances | 1 | 3 VM Archivers per ESXi host | 4 VM Recorders per ESXi host |
Write BW per Recorder MB/s (Mb/s) | 90 (720) | 40 (320) | 17 (136) |
Total Write BW per server MB/s (Mb/s) | 110 (880) | 120 (960) | 68 (544) |
Total IOPS | 382 | 425 | — |
Disk Rebuild duration Days | 11 | 11 | 13 days 8 hours |
Video Data storage | Local | Local | Local |
PowerEdge R740xd with local storage
The following table provides bandwidth-sizing guidelines with local storage based on our test results.
Specification | R740xd | |
XProtect Version | 2018 | |
CPU | 2 X 12 Cores Intel(R) Xeon(R) Gold 6126 CPU @ 2.60GHz | |
RAM GB | 256 | |
Drive type | NL-SAS | |
NIC speed | 2X10 Gb | |
Storage Controller | H730P | |
No of drives X Drive size TB | 16 X 8 TB | |
RAID | 6 (13+2) | |
HotSpare | 1 | |
Host Operating system | Windows Server 2012 R2 | ESXi |
No of Instances | 1 | 3 VM Recorder per ESXi host |
Write BW per Recorder MB/s (Mb/s) | 90 (720) | 30 (240) |
Total Write BW per server MB/s (Mb/s) | 90 (720) | 90 (720) |
Total IOPS | 741 | 900 |
Disk Rebuild duration Days | 10 | 11 |
Video Data storage | Local | Local |