Oh thanx for this fast reply and this interesting website link!
But are these suggestions in the website really correct? They suggest a "PCIe 3.0 x4 NVMe 1.3" SSD, although the Latitude 5590 uses a "PCIe x2 NVMe". So an x4 and an x2 Interface - x4 has double speed and a different number of pins than the x2. Does this really fit?
I think, the only way to upgrade the Latitude 5590 to 2TB would be replacing the 2.5 inch SATA drive, if possible...?
Although the Latitude 5590 owners manual claims, that the maximum capacity for the 2.5 inch SATA drive slot woud be 1 TB, I'm meanwhile using there Crucial MX500 2TB with no problems.
For the capacity question, you will be fine as long as the drive physically fits -- 2.5" drives come in a variety of thicknesses, and M.2 drives come in a variety of lengths, though the overwhelming majority are 2280. There hasn't been a hardware/firmware-based limitation on drive capacity since the Windows XP days where you needed SP1 and a motherboard BIOS that supported 48-bit LBA addressing to use drives larger than (I think) 137GB. There is currently no practical limit on drive capacity as far as hardware and firmware is concerned. The 2TB "limit" is a separate issue and doesn't apply to the boot drives of UEFI systems anyway.
The question about PCIe lanes is a bit more nuanced, though. An M.2 SSD that only supports PCIe x2 should be "B-keyed", designed to go into a B-keyed slot, while an M.2 SSD that supports PCIe x4 is supposed to be "M-keyed", designed to go into an M-keyed slot. M.2 SATA SSDs are "B+M keyed" so they can physically fit into either slot type. All that said, I haven't actually found any B-keyed SSDs on the market, so my guess would be that in the interest of compatibility, the 5590's slot is M-keyed and will accept SSDs that are M-keyed SSDs and support PCIe x4, even if the system itself might run them at PCIe x2 speed, which would limit sequential read/write performance to around 1.8 GB/s. Your best way to confirm would probably be to look for reviews of the 5590 that mention the specific SSD model that it came with and then check the specs of that unit to see if it's B-keyed or M-keyed, or else look around this forum for posts from people who have successfully replaced their SSD with some other unit, and again check the specs of the SSD they installed.
And yes, you could of course just get a 2TB 2.5" SSD, but those will be SATA SSDs, and SATA SSDs are much slower than NVMe SSDs, even if the NVMe SSD is running at PCIe x2.
JOcean
9 Legend
•
12.6K Posts
0
November 23rd, 2018 16:00
The following site, which sells Dell compatible hardware, lists a 2 TB SSD (2.5") drive as compatible. Yes it is a real SSD, NOT a hybrid.
https://www.mrmemory.co.uk/ssd-upgrades/dell/latitude/5590#!samsung-970-evo-m.2-nvme-ssd
As for your other question..Self Encription Drives...
https://en.wikipedia.org/wiki/Opal_Storage_Specification
popanz
5 Posts
0
November 23rd, 2018 18:00
Oh thanx for this fast reply and this interesting website link!
But are these suggestions in the website really correct?
They suggest a "PCIe 3.0 x4 NVMe 1.3" SSD, although the Latitude 5590 uses a "PCIe x2 NVMe".
So an x4 and an x2 Interface - x4 has double speed and a different number of pins than the x2.
Does this really fit?
I think, the only way to upgrade the Latitude 5590 to 2TB would be replacing the 2.5 inch SATA drive, if possible...?
popanz
5 Posts
0
February 3rd, 2019 12:00
Although the Latitude 5590 owners manual claims, that the maximum capacity for the 2.5 inch SATA drive slot woud be 1 TB, I'm meanwhile using there Crucial MX500 2TB with no problems.
jphughan
9 Legend
•
14K Posts
0
February 3rd, 2019 14:00
For the capacity question, you will be fine as long as the drive physically fits -- 2.5" drives come in a variety of thicknesses, and M.2 drives come in a variety of lengths, though the overwhelming majority are 2280. There hasn't been a hardware/firmware-based limitation on drive capacity since the Windows XP days where you needed SP1 and a motherboard BIOS that supported 48-bit LBA addressing to use drives larger than (I think) 137GB. There is currently no practical limit on drive capacity as far as hardware and firmware is concerned. The 2TB "limit" is a separate issue and doesn't apply to the boot drives of UEFI systems anyway.
The question about PCIe lanes is a bit more nuanced, though. An M.2 SSD that only supports PCIe x2 should be "B-keyed", designed to go into a B-keyed slot, while an M.2 SSD that supports PCIe x4 is supposed to be "M-keyed", designed to go into an M-keyed slot. M.2 SATA SSDs are "B+M keyed" so they can physically fit into either slot type. All that said, I haven't actually found any B-keyed SSDs on the market, so my guess would be that in the interest of compatibility, the 5590's slot is M-keyed and will accept SSDs that are M-keyed SSDs and support PCIe x4, even if the system itself might run them at PCIe x2 speed, which would limit sequential read/write performance to around 1.8 GB/s. Your best way to confirm would probably be to look for reviews of the 5590 that mention the specific SSD model that it came with and then check the specs of that unit to see if it's B-keyed or M-keyed, or else look around this forum for posts from people who have successfully replaced their SSD with some other unit, and again check the specs of the SSD they installed.
And yes, you could of course just get a 2TB 2.5" SSD, but those will be SATA SSDs, and SATA SSDs are much slower than NVMe SSDs, even if the NVMe SSD is running at PCIe x2.