Dell Ultrastar DC SS540 800GB drives only showing 400GB usable.

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bl8demast3r

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Mar 13, 2024
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Hi everyone,

I recently picked up some Dell Ultrastar DC SS540 WUSTR6480BSS200 800GB drives and for some reason they are showing up in Proxmox as only 400GB drives. The label on the drives say 800GB so I'm not sure why it's only showing 400GB usable. Here is the eBay listing with the drive labels that match mine. Dell WUSTR6480BSS200 DC SS540 800GB 2.5" 12Gb/s SAS SSD Dell P/N: 06VJC9 | eBay

Anybody have any similar experiences with enterprise SSDs and could share a way to fix this? Or have an explanation as to why these drives exist and come with a label that says "800GB"

Code: 
# fdisk -x /dev/sdg
Disk /dev/sdg: 372.53 GiB, 400000000000 bytes, 781250000 sectors
Disk model: W0QTR648 EMC400
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 518E877F-3FE5-401E-8D4D-9FF246FE8348
First usable LBA: 2048
Last usable LBA: 781249966
Alternative LBA: 781249999
Partition entries starting LBA: 2
Allocated partition entries: 128
Partition entries ending LBA: 33
Code: 
# smartctl -a /dev/sdg
smartctl 7.4 2024-10-15 r5620 [x86_64-linux-6.17.4-1-pve] (local build)
Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HITACHI
Product:              W0QTR648 EMC400
Revision:             S109
Compliance:           SPC-5
User Capacity:        400,000,000,000 bytes [400 GB]
Logical block size:   512 bytes
Physical block size:  4096 bytes
LU is resource provisioned, LBPRZ=1
Rotation Rate:        Solid State Device
Form Factor:          2.5 inches
Logical Unit id:      0x5000cca0b8782898
Serial number:        W2X42KSY
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Thu Feb 12 17:55:31 2026 EST
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Percentage used endurance indicator: 0%
Current Drive Temperature:     32 C
Drive Trip Temperature:        72 C

Accumulated power on time, hours:minutes 24094:40
Manufactured in week 07 of year 2022
Specified cycle count over device lifetime:  0
Accumulated start-stop cycles:  0
Specified load-unload count over device lifetime:  0
Accumulated load-unload cycles:  0
Elements in grown defect list: 0

Vendor (Seagate Cache) information
  Blocks sent to initiator = 2496142

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:          0        0         0         0          0      45632.769           0
write:         0        0         0         0          0      39396.898           0

Non-medium error count:      161

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Reserved(3)       Completed                   -       6                 - [-   -    -]
# 2  Reserved(3)       Completed                   -       5                 - [-   -    -]
# 3  Reserved(3)       Completed                   -       3                 - [-   -    -]
# 4  Reserved(3)       Completed                   -       3                 - [-   -    -]

Long (extended) Self-test duration: 1320 seconds [22.0 minutes]
Thanks
 

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mr44er

Active Member
Feb 22, 2020
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bl8demast3r said:
Or have an explanation as to why these drives exist and come with a label that says "800GB"
Click to expand...
Backwards compatibility / replacement parts for the 400GB model / machines that expect it that way.


I would try this and hope for the best (replug after it is done):
Code: 
sg_format --format --size=4096 --fmtpinfo=0 -v /dev/sd$
sg_format --format --size=512 --fmtpinfo=0 -v /dev/sd$
 
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BlueFox

Legendary Member Spam Hunter Extraordinaire
Oct 26, 2015
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Probably just overprovisioned. Check with hdparm (which can also change it):

hdparm -N /dev/sd[x]
 
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bl8demast3r

New Member
Mar 13, 2024
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mr44er said:
Backwards compatibility / replacement parts for the 400GB model / machines that expect it that way.


I would try this and hope for the best (replug after it is done):
Code: 
sg_format --format --size=4096 --fmtpinfo=0 -v /dev/sd$
sg_format --format --size=512 --fmtpinfo=0 -v /dev/sd$
Click to expand...
No dice on the sg_format :( I think it's firmware locked based on that thread you linked to. I've contacted the eBay seller but they have not responded. I'm not even sure if it would be possible to obtain the firmware to flash it to a non EMC400 firmware.
 
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bl8demast3r

New Member
Mar 13, 2024
4
0
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BlueFox said:
Probably just overprovisioned. Check with hdparm (which can also change it):

hdparm -N /dev/sd[x]
Click to expand...
So hdparm returns this:
Code: 
# hdparm -N /dev/sdg

/dev/sdg:
SG_IO: bad/missing sense data, sb[]:  70 00 05 00 00 00 00 18 00 00 00 00 20 00 00 c0 00 00 00 00 f8 21 00 00 00 00 00 00 00 00 00 00
sg_readcap returns this:
Code: 
# sg_readcap /dev/sdg
Read Capacity results:
   Last LBA=781249999 (0x2e90edcf), Number of logical blocks=781250000
   Logical block length=512 bytes
Hence:
   Device size: 400000000000 bytes, 381469.7 MiB, 400.00 GB
 
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mr44er

Active Member
Feb 22, 2020
161
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bl8demast3r said:
No dice on the sg_format :( I think it's firmware locked based on that thread you linked to
Click to expand...
Yeah some fw is really locked down evil. https://forums.servethehome.com/ind...g-the-hgst-hdd-ssd-firmware.22381/post-497447

bl8demast3r said:
I'm not even sure if it would be possible to obtain the firmware to flash it to a non EMC400 firmware.
Click to expand...
:)


The rabbit hole with much, much pain and spent time. ;)
 
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bl8demast3r

New Member
Mar 13, 2024
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mr44er said:
Yeah some fw is really locked down evil. https://forums.servethehome.com/ind...g-the-hgst-hdd-ssd-firmware.22381/post-497447


:)


The rabbit hole with much, much pain and spent time. ;)
Click to expand...
Thanks for this! Thankfully the eBay seller got back to me and approved a return so I will be doing that. Hopefully the threads you posted will help some other poor soul who ends up buying one of these drives and comes across this thread!
 
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