Once I learned that the newer Graid chassis don't support the old Graid configuration tool I was able to replace the 2 10TB drives that came with the 20TB Graid with two 4TB deskstar drives and using disk utility in OS 10.12.6 create a raid set with the drives. So now the Chassis that was originally 20TB is 8TB and exporting the DPX to these drives Avid is estimating approx. 4 hours and 50 minutes. So that is close to the time when it was a 20TB drive set.
These same drives when put into what was originally an older 4TB Graid that uses the Graid configuration tool to create the raid se yields an Avid DPX export of 15 ish hours. Drive speed tests are both around 300mB/sec in either chassis so even though that is similar the Avid DPX performance is vastly different. I can only assume there is something different in the hardware of the Graid removable chassis that is older circa 2013 compared to the newer chassis circa 2016.
I have also been informed by the support folks at Areca that the 8 drive tower from 2013ish was using sata 2 to USB 3 hardware and for that the 175mB/sec is what would be expected. Surprising given it's an 8 drive raid array using hardware raid but that's what the manufacturer said. It makes me wonder if there is something like this going on in my Graid comparisons. But since both Graid chassis have similar drive speed tests it would have to be a hardware difference that is sensitive the exporting DPX files. As has been suggested the nibble factor of DPX with many small files might be the contributing factor. This is just me guessing based on what I'm seeing. Anybody got disk drive chops to confirm or deny that older Graid hardware may not handle the DPX exports as well as newer Graid hardware?
---In Avid-L2@yahoogroups.com, <bigfish@...> wrote :
Heres something I learned today about the newer Graid 20TB with thunderbolt.
- G-RAID with Thunderbolt (Thunderbolt only):
The G-RAID with Thunderbolt does not use a configuration tool, it is a Software RAID solution. On macOS it is managed with Disk Utility, please see Answer ID 14042: How to use Disk Utility to Create a RAID 0 Array and Answer ID 14045: How to use Disk Utility to Create a RAID 1 Array. Apple has removed the ability to manage Software RAID drives with the Disk Utility in macOS 10.11 (El Capitan), it can still manage it via the Terminal or using a 3rd party solution called SoftRAID.
I have tried putting bigger drives in the 4TB Graid and it worked but there was no speed increase. Attempts to put the same drives into the 20TB Graid chassis aren't working. The configuration tool doesn't work but it sounds like now disk utility is the way to go but I get issues as I try to initialize/erase the drives when they are in the 20TB Graid chassis. The drives in the 20TB chassis are dated in 2016 so I think this is a thunderbolt 2 chassis. I'm only using usb 3 but I can't get the Graid configuration utility to see this chassis. It sees the older 4TB chassis which seems to be from 2014 just fine.
My latest test to the 20TB Graid shows 4 hours 20 minutes to export. Given the above info from Graid I'm surprised that this is apparently software raid and not hardware raid. I always thought hardware raid was faster. So many curiosities.
__._,_.___
Posted by: bigfish@pacbell.net
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (9) |
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.
this is the Avid-L2
SPONSORED LINKS
.
__,_._,___
No comments:
Post a Comment