ISDCT occasionally reports very high NativeMaxLBA

[Daniel_M_Intel2]

Hi,

We sometimes encounter a problem where ISDCT reports very high NativeMaxLBA. I have logs from Ubuntu 16 (I'm not sure if problem happens on other OSes), where NVMe drive is formatted to atomic format (LBAF 1):

nvme_id_ns /dev/nvme0n1 | grep '(in use)'

# Exit code: 0, duration: 00:00:00.0155966

# stdout:

# lbaf 1 : ms:8 ds:9 rp:0x2 (in use)

isdct show -display Index -intelssd

# Exit code: 0, duration: 00:00:00.1250539

# stdout:

# - Intel SSD DC P3700 Series CVFT42150041400BGN -

# Index : 0

# - Intel SSD DC P3700 Series CVFT42150085400BGN -

# Index : 1

# - Intel SSD DC S3700 Series BTTV227401GB100FGN -

# Index : 2

# - Intel SSD DC S3700 Series BTTV227301HG100FGN -

# Index : 3

isdct show -display NativeMaxLBA -intelssd 0

# Exit code: 0, duration: 00:00:00.1250295

# stdout:

# - Intel SSD DC P3700 Series CVFT42150041400BGN -

# NativeMaxLBA : 9223372036854775807

isdct set -intelssd 0 MaximumLBA=native

# Exit code: 0, duration: 00:00:00.1406744

# stdout:

# Set MaximumLBA successful. Please power cycle the device.

isdct show -display MaximumLBA -intelssd 0

# Exit code: 0, duration: 00:00:00.1250353

# stdout:

# - Intel SSD DC P3700 Series CVFT42150041400BGN -

# MaximumLBA : 781422767

The value displayed in red is max Int64 value. As you can see after setting NativeMaxLBA to 'native' value returns to normal. Any ideas what could cause such behavior?

[idata]

Hello Deix,

Thanks for posting in our community. We understand that you're experiencing a problems with the reported NativeMaxLBA for your NVMe drives.In order to better assist you, please provide us with the following information:- What ISDCT (Intel® SSD Data Center Tool) version are you using?- Is the issue limited to your Intel® SSD DC P3700 Series, or are there other models affected?- What's the firmware version on your Intel® SSD DC P3700 Series?- Have you confirmed if the reported value is present on other NVMe drive formats other than LBAF 1?Best regards,Eugenio F.

[Daniel_M_Intel2]

Hello Eugenio,

The ISDCT version used was 3.0.9.

For now we have 2 documented occurrences, both on Intel SSD DC P3700 Series drives formatted to LBAF 1, with 8DV10130 firmware on one and 8DV10171 on the other device.

There were some earlier sightings for this issue, but unfortunately no data were collected and I cannot confirm that only this configuration is affected basing on 2 mentioned occurrences.

Best regards!

[idata]

Hello Deix,

Thanks for your reply.Thehttps://www.intel.com/content/www/us/en/support/articles/000017245/memory-and-storage.html latest firmware for Intel® SSD DC P3700 Series is 8DV101H0. Please install the https://downloadcenter.intel.com/download/27497/Intel-SSD-Data-Center-Tool?v=t latest version of ISDCT (3.0.10 as of today) and update the firmware on both drives using ISDCT.Please let us know if the issue persists.Best regards,Eugenio F.

[Daniel_M_Intel2]

Hi,

I have updated ISDCT to 3.0.10 and performed FW update on few NVMe P3700 disks (not the ones tested before) and all disks with new FW are non-formattable now. (Actually format works only to current setting which is LBAF 0, any other target LBAF results in output as below). This also means that I cannot provide any info if the FW update solves our earlier problem. I'm not going to update any more disks for now, as we don't want to lose the ability to change LBAF.

# isdct show -intelssd 0

- Intel SSD DC P3700 Series CVFT4215005G400BGN -

Bootloader : 8B1B0133

DevicePath : /dev/nvme0n1

DeviceStatus : Healthy

Firmware : 8DV101H0

FirmwareUpdateAvailable : The selected Intel SSD contains current firmware as of this tool release.

Index : 0

ModelNumber : INTEL SSDPEDMD400G4

ProductFamily : Intel SSD DC P3700 Series

SerialNumber : CVFT4215005G400BGN

# isdct start -intelssd 0 -nvmeformat LBAFormat = 1 SecureEraseSetting = 0 MetadataSettings = 1

WARNING! You have selected to format the drive!

Proceed with the format? (Y|N): y

Formatting...(This can take several minutes to complete)

- Intel SSD DC P3700 Series CVFT4215005G400BGN -

Status : NVMe command reported a problem.

With other tool:

# nvme_format_ns /dev/nvme0n1 1 1 0

Entered format index 1, ms 1, ses 0, formatting namespace

NVME Admin command error:6

Do you have any recommendation so we can format the disks again? Is there a possibility to downgrade FW?