rsd12
2 Bronze

Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

I purchased a Seagate 4TB Barracuda Internal Desktop Hard Drive - 3.5" Form Factor, SATA III 6 Gb/s, 64 MB Cache - ST4000DM000 for my Precision T7400.  On boot it recognizes the disk, but does not give a capacity.  Within Windows, the drive is not listed. However, I am able to view it with Disk Management.  In Disk Management, the drive is unallocated and only reads as 2048.00gb instead of the 4000.00gb.  I have updated my bios and sas drivers in the Dell support section.  Solutions?  Fixes?  Bios setting changes?  Additional Drivers?  Just wasted money on a 4TB hd?   

 

Thanks everyone!  

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7 Replies
Mary G
7 Thorium

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

It has to be formatted to get recognized correctly. What operating system?

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theflash1932
7 Thorium

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

Do you have it connected to the motherboard or a controller card?  If a card, which one?  If the motherboard, try updating the chipset/AHCI drivers to the latest (may need to get them from Intel if Dell's are not recent).

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Dev Mgr
7 Gold

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

Did you connect the 4TB drive to one of the SAS ports on the motherboard? If so, that's likely why you can only see the first 2TB.


I have the successor to your T7400; the T7500. This has a SAS6iR card built onto the motherboard. This card (and the bigger brother the PERC6) only supports drives up to 2TB (2048GB to be precise). I can't find it in the T7400 manual, but I suspect it to have either a SAS5 card or SAS6 card on the motherboard.

Your only choice to use the full 4TB is to connect it to one of the SATA ports, but not make it a boot drive (as the T7400 doesn't support UEFI, it can only boot from MBR disks, so it can only use the first 2TB of any given drive).

On my T7500 a 4TB Hitachi drive is working just fine when connected to one of the SATA ports.

If your drive is an actual SAS drive (and therefor won't connect to a SATA port), your only options are to either get a PCIe SAS controller that supports drives larger than 2TB, or replace the drive with a smaller drive (no larger than 2TB). From Dell this would mean any H-series PERC (H200, H310, H700, H710), but there are also many LSI options that will likely work just fine in your T7400.

Member since 2003

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tbui98
2 Bronze

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

I'm using Seagate 3-3TB (ST3000DM001) and Western Digital 2-3TB (WD30EZRXSP) as secondary drives in my T7400.  I'm running 2008R2 (Win7 equilvalent I think) 64-bit.  For the drives that are plugged in the SAS ports,  I saw exactly what you see-- only 2048GB.  Only the one that plugged into the SATA will let me format with GPT and it sees 3TB (2.7 something).  So, I plug each one into the SATA port, format it, and then put it in the SAS port.  Once formatted, windows seems to see all of them fine (hopefully, I haven't run into any issue yet).  I use a SSD as a boot drive.  Hope it helps.

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tlh129
2 Bronze

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

I have a T7500. I can't even get mine to see a 2TB Seagate. Can you tell me where you went to get your updates? I was able to reformat the drive in Windows via an external usb/sata device. However, the internal board does not work at all.

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speedstep
8 Krypton

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

There are INTEL RST and Motherboard Bios Limitations.  WDC handles this with a Highpoint Rocket 620-OEM Series HBA. Larger than 2TB GPT partitions require 64 bit versions of windows. 2TB is the max limit for MBR.

R600 Adapter.pdf

[View:WDC 3TB Installation Video]

http://www.newegg.com/Product/Product.aspx?Item=N82E16816115072

 


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tlh129
2 Bronze

RE: Precision T7400 not recognizing Seagate SAS Hard Drive 4TB

Thanks SpeedStep. I figured that would definitely be the easiest solution, but it is just frustrating that this otherwise awesome machine can't see a 2TB drive. I  have 192GB RAM installed but it can't see a 2TB drive.  So did you exhaust everything else?

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