Am 18. May, 2025 schwätzte James Mcphee via PLUG-discuss so:
moin moin,
> I've run into things similar and it depends on what you're running. If
> it's udev, make a rule in /etc/udev/rules.d/numbered-rule.rules with
> SUBSYSTEM=="block", ACTION=="add", ENV{ID_FS_UUID}==
> "123e4567-e89b-12d3-a456-426614174000", NAME="sda"
> or whatever. Dunno if this does what you want, but you can pretty much do
> something like this to handle that kinda thing if you're running udev.
I'd been looking at UDEV rules, but hadn't made any progress.
I've now found udevadm.
sudo udevadm info --query=all --name=/dev/sdf1 | grep -i uuid
that gave me several options, but I also found a claim that systemd-udev
won't let you change a device name, only add an alias.
My disks already have more aliases than my shell environement.
found udevadm test, which gives a lot of output.
This has some recognizable paterns - /usr/lib/udev/rules.d/60-persistent-storage.rules
Still need to look at /dev/md/${NAME} for mdadm.
ciao,
der.hans
> On Sat, May 17, 2025 at 10:20 PM der.hans via PLUG-discuss <
> plug-discuss@lists.phxlinux.org> wrote:
>
>> Am 17. May, 2025 schwätzte Ryan Petris via PLUG-discuss so:
>>
>>> You can't, unfortunately. The only thing in /dev you can technically
>>> rename are network interfaces; the rest you can only add symlinks for,
>>> which is what for instance /dev/disk/by-partlabel/* is.
>>
>> A shame, I like long path names :)
>>
>>> Why do you care what mdadm shows for device names anyway? If you're
>>> concerned that it will pick up the wrong disk on reboot, it won't
>>> because internally it's using its own identifiers to find the right
>>> drives, and will snow you whatever /dev/sd* it happens to end up
>>
>> It picked up the wrong devices when powering the drive bay down and up
>> again. mdadm was showing and trying to use the orginal sd names rather
>> than the newly assigned names.
>>
>> I will experiment more with mdadm. It's been a while since I used it, so
>> was expecting some reacquaintance exercises to be necessary.
>>
>> ciao,
>>
>> der.hans
>>
>>> on when running mdadm commands. If you want to figure out which
>>> /dev/sd* device belongs to your disk label, you can just run `readlink
>>> /dev/disk/by-partlabel/raid...`.
>>
>>
>>>
>>> On Sat, May 17, 2025, at 6:46 PM, der.hans via PLUG-discuss wrote:
>>>> moin moin,
>>>>
>>>> I'm using a USB JBOD enclosure to build a RAID set.
>>>>
>>>> Restarting the enclosure ends up with the drives on new names, e.g. sda,
>>>> sdb and sdc come back sdd, sde and sdf.
>>>>
>>>> I added labels to my disk partitions and was hoping to use them, e.g.
>>>> /dev/disk/by-partlabel/raid{0,1,2}, but mdadm turned them back to
>>>> /dev/sd{d,e,f} names as members of the array
>>>>
>>>> Anyone know how I can either get /dev/sd names not to change for
>> removable
>>>> media or get mdadm to accept the names I want to use?
>>>>
>>>> I'd rather the latter.
>>>>
>>>> ciao,
>>>>
>>>> der.hans
>>>> --
>>>> # https://www.SpiralArray.com https://www.PhxLinux.org
>>>> # <arclight> Delicious red tape, like a Twizzler but flat. And
>> adhesive.
>>>> ---------------------------------------------------
>>>> PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org
>>>> To subscribe, unsubscribe, or to change your mail settings:
>>>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
>>>>
>>>
>>
>> --
>> # https://www.SpiralArray.com https://www.PhxLinux.org
>> # "Luckily, this is a comic book, for which no idea is too complex."
>> # -- Larry Gonick from The Cartoon History of the United
>> States---------------------------------------------------
>> PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org
>> To subscribe, unsubscribe, or to change your mail settings:
>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
>>
>
>
>
--
# https://www.SpiralArray.com https://www.PhxLinux.org
# "To enjoy the flavor of life, take big bites. Moderation is for monks."
# -- Robert Heinlein
---------------------------------------------------
PLUG-discuss mailing list:
PLUG-discuss@lists.phxlinux.org
To subscribe, unsubscribe, or to change your mail settings:
https://lists.phxlinux.org/mailman/listinfo/plug-discuss
(text/plain)