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ISDCT occasionally reports very high NativeMaxLBA

Daniel_M_Intel2
New Contributor

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?

15 REPLIES 15

idata
Esteemed Contributor III

Hello Deix,

I'll like to check this with our engineers. Before I do so, there are a couple of things we need to confirm:

- What's your motherboard model?

- Are the Intel® SSD DC P3700 plugged directly to the motherboard PCIe slots, or are there any devices in between (such as a RAID controllers)? If so, please provide us with the device model.

- We understand you're using Ubuntu 16*. What's the exact version and kernel?

Best regards,

Eugenio F.

idata
Esteemed Contributor III

Hello Deix

We haven't heard from you in a while. Please let us know if there's anything else we can do for you.

Best regards,

Eugenio F.

Hi Eugenio,

It busy time for me, hence the delay

The info you asked for:

1. Motherboard in mentioned computer is:

Manufacturer: ASUSTeK COMPUTER INC.

Product Name: RAMPAGE IV EXTREME

Version: Rev 1.xx

2. The drives are plugged directly to PCIe slots

3. We use Ubuntu 16.04 on kernel 4.4.0-28-generic

Hope this info will be useful.

Regards,

Daniel

idata
Esteemed Contributor III

Hello Deix,

Thanks for your reply. I'll review this with a higher tier of support and we'll be back with you as soon as possible.Best regards,Eugenio F.

idata
Esteemed Contributor III

Hello Deix,

Some points regarding your configuration called our attention. Please let us know the following:

- Can you test formatting the drives on a different flavor of Linux*? ISDCT has not been validated on Ubuntu* and the drives are usually tested on Red Hat* and SUSE*.

- Have you tested using a previous version of ISDCT? You upgraded from version 3.0.9 to 3.0.10. The previous version is https://downloadcenter.intel.com/download/27248/Intel-SSD-Data-Center-Tool still available for download.

Best regards,

Eugenio F.