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1 Rookie
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2 Posts
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33
January 23rd, 2026 06:58
Can't boot from installed os on nvme
Hey Community,
So I have a R640 with the 10x backplane that supports NVMes and all nvme needed cables are installed.
iDRAC regognices the nvme drives and lists them correctly in PCIeSSD BaySlot 2:1, PCIeSSD BaySlot 3:1 etc.
I booted an Ubuntu 22.04 LTS installation (Supported OS for R640) and installed the os without errors on one of the nvme drives.
After rebooting it just shows "Unavailable: ubuntu". As far as I understand the R640 supports booting from nvme and I can't seem to work out why it doesn't want to boot from them. (Tried other os as well but ubuntu is officially supported to trying to get that working as a start).
Secure boot is disabled, nvme is in non-raid mode (only mode available)
If anyone has any ideas what may be the problem please tell me :)
Zoey
DELL-Joey C
Moderator
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4.1K Posts
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January 26th, 2026 09:40
Hi,
Can you confirm which mode did you configure the BIOS to install the OS, UEFI or Legacy?
Also, here are some supported NVMe SSDs:
Supported Drives - NVMe SSD
NVMe PM1725A 800GB 2.5" PCIe SSD
NVMe PM1725A 1.6TB 2.5" PCIe SSD
NVMe PM1725A 3.2TB 2.5" PCIe SSD
NVMe PM1725A 6.4TB 2.5" PCIe SSD
ZoeyG
1 Rookie
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2 Posts
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January 26th, 2026 14:36
Hey,
the BIOS and install are both in UEFI mode.
For a test I installed the EFI and boot partition on a internal usb stick and the system correctly boots from them and works without problems with the drives. So it seems that the server doesn't like the boot and efi partition on the nvme.
Can you tell me if Dell PE8010 RI U.2 are supported in a R640?
If so I would put some of them in the Server and install the os on them.
Wasn't my inital plan but if they are supported and it works, would be a solution for me
Zoey
DELL-Charles R
Moderator
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4.7K Posts
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January 26th, 2026 15:41
Hello,
I do not see the PE8010 in the R640 validated database.
Only the ones Joey listed are validated.
Maybe someone in the forum that has tried it can share their experience.