dell t7500 questions about sas

the13bats

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Dec 29, 2013
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I have made several comps and just had this dell t7500 given to me,

I want to use it as a pc not a server,
On the motherboard
It has 3 sata connectors and 4 connectors called sas, in the bios it has options to enable or disable sas,

At the moment i have the sas set to disable and my os on a hdd plugged into a sata connector, works great,

I would like to add 3 or 4 hdds for storage, pix on one tunes on another etc,

Can the sas connectors be used for those storage drives each with a separate drive letter,

Thanks for cluing me in on this sas thing,

Cheers,
B
 
Solution
SAS is not my area of expertise but, I saw a post that SAS controllers are backwards compatible with SATA. SAS is full duplex and can read/write at the same time, and have higher speeds. SATA not. Since gaming happens in system memory and GPU memory this is no big deal.


the 13bats,

I'm a bit confused as to the total number of drives and as to SATA and/or SAS you intend to use but Form me the principal issue is that the T7500 is SATAII 3GB/s.

But there is a cure!

Consider adding a PERC H310 SATA/SAS RAID controller.

PERC H310 technical specification

Solution provided

Low-cost, green SATA+SAS RAID solution for high-density servers (1U or 2U) and workstations with the flexibility
to use both SATA and SAS hard drives, solid state drives, and pass-through drive configurations
Physical dimensions
167.6mm (6.6in) x 64.4mm (2.5in) (low profile)

Connectors
Two x4 internal mini-SAS SFF8087

Maximum number of Physical devices:

Non-RAID: 32
RAID 0: 16 per volume
RAID 1: 2 per volume plus hot spare
RAID 5: 16 per volume
RAID 10: 16 per volume
RAID 50: 16 per volume

Host bus type
8-lane, PCI Express 2.0 compliant
Data transfer rates
Up to 6Gb/s per port

SAS controller

LSISAS2008
Key RAID data protection

Features

RAID levels 0, 1, 5, 10, 50:
Selectable logical drive as boot drive
Consistency check
Fast initialization for quick array setup
Native command queuing
Staggered spin-up for SATA drives
Hot-plug support
Global hot-spare support
Online Capacity Expansion (OCE)
Online RAID Level Migration (RLM)
PowerPC 440
Automatic rebuild of hot-spare drives
Auto resume during array rebuild
Greater than 2TB logical drive support
Soft bad block management
Error recovery support
DDF compliant configuration on disk
S.M.A.R.T. support
Patrol read for media scanning and repairing
Physical disk power management (Dimmer Switch™)

So, the H310 provides extreme versatility in the drives department. I added one to a Precision T5500 (see below). The performance also improved significantly: without changing the drives: using a Samsung 840 240GB and WD Black 1TB, the Passmark disc score changed from 2122 to 2649. These are sold on Ebay US currently for $59-$80. If you do try it, be sure that it is the low profile version that includes the desktop PCIe slot bracket. The server model doesn't and they cost $10.

Yes, you can have dozens of 6GB/s drives and run out of letters!

I recommend running Passmark Performance Test- there's a free trial version and before-and after- follow the improvements to the T7500.

If' you're gaming, have a look at the CPU with the highest single=thread performance, the Xeon X5687 - 3.6 /3.86GHz

Cheers,

BambiBoom

HP z620_2 (2017) (Rev 1) > Xeon E5-1680 v2 (8-core@ 4.3GHz) / z420 Liquid Cooling / 64GB DDR3-1866 ECC Reg / Quadro P2000 5GB / HP Z Turbo Drive M.2 256GB + Intel 730 480GB + Seagate Constellation ES.3 1TB / ASUS Essence STX PCIe sound card / 825W PSU /> Windows 7 Prof.’l 64-bit > 2X Dell Ultrasharp U2715H (2560 X 1440) / Logitech z2300 2.1 Sound
[ Passmark Rating = 6322 / CPU rating = 17178 / 2D = 852 / 3D= 9012 / Mem = 3032 / Disk = 14227 / Single Thread Mark = 2339 [7.3.17]
[ Cinebench R15 = cb1214 (CPU) / 153 (Single Threaded) / 150.77 (OpenGL) MP Ratio 7.92x / Accuracy 99.6% ] 7.21.17

Dell Precision T5500 (2011) (Revised) > 2X Xeon X5680 (6-core @ 3.33 / 3.6GHz), 48GB DDR3 1333 ECC Reg./ Quadro K2200 (4GB ) / PERC H310 / Samsung 840 250GB + WD RE4 Enterprise 1TB / M-Audio 192 sound card /> 875W PSU > Windows 7 Professional 64 > HP 2711x (27", 1920 X 1080) / Logitech z313 speakers
[ Passmark system rating = 3844 > CPU = 15047 / 2D= 662 / 3D= 3550 / Mem= 1785 / Disk= 2649] (12.30.15)
 

the13bats

Distinguished
Dec 29, 2013
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18,535
Sounds like i did confuse the heck out of what im wanting to know, and a lot of what you posted is above my pay rate,

I thought a raid was drives that are copies of each other all with same data,
Not anything i want or need, but i sure dont understand much of it,

I have my os on a hdd so thats one drive its plugged into a sata port,

An optic drive is plugged into a second sata port and the third sata port is empty,

All 4 sas ports are empty, however in the past several days of testing this beast the computer doesnt seem to care if i have my os drive plugged into a sata port or sas port it boits and seems to work just fine, but at this moment like i said the os drive is plugged into a sata port,
my os drive is sata.

Total drives i desire, in addition to os drive perhaps 2 to 4 more, each with different data so i dont want raid if raid is what i believe it to be,

On google researching this comp i saw,a fellow added a sata3 card and it had 4 ports he used one for a ssd and the other 3 for data drives like i want to do,

So my basic question is will the sas ports on my motherboard allow me to plug in 4 drives each with different data or does the sas port force all drives plugged into it to be clones of each other?

As you see some things i understand and some not so much so please clue me in...

Thanks,
B
 
SAS is not my area of expertise but, I saw a post that SAS controllers are backwards compatible with SATA. SAS is full duplex and can read/write at the same time, and have higher speeds. SATA not. Since gaming happens in system memory and GPU memory this is no big deal.
 
Solution