Can I run G-Speed ES eSATA and ES PRO SAS on same MacPro?

G-Technology G-SPEED & G-SAFE
1

I have several older G Speed ES drives along with a newer ES PRO SAS.
I have a PCI card for the eSATA drives, and bought an ATTO card for the SAS drive.
My question is, can I install both cards and run both drives (ESATA and SAS) at the same time on my MacPro?

2

Hello Deke,

Yes,you can absolutely use both devices simultaneously.

3

Hi Rydia,
Thanks for your reply…

I moved the ATTO R348 card to Slot 2 (don’t know if that makes a difference from Slot 3 or 4 since it’s a 16x slot vs. 4x) and installed the G-speed PCI ESata card into slot 4. I have a Blackmagic video card in slot 3.

With the AJA system test or Blackmagic Speed Disk test, the SAS Raid (Raid 5) is getting about 363MB/s write/348 read but the G-Speed eSata (Raid 0) is only getting about 130MB/s write/160MB/s read. This seems very low for RAID 0 although this drive is about 1/2 full and the ESPRO drive is empty. Both RAID drives check out okay with no degraded drives.

I thought that SAS was slightly faster than eSATA, but is this speed difference normal?

Thanks.

4

Hello Deke,

It is very normal for that kind of performance difference. miniSAS is multi-channel instead of a single eSATA, It can be about double the performance.