- cross-posted to:
- linuxhumor@lemmy.ml
- cross-posted to:
- linuxhumor@lemmy.ml
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Doesn’t dd pick sda by default?
Commands like
ddare the best. Good ole greybeard-era spells with arcane syntax and the power to casually wipe out the whole universe (from their perspective ofc) if used haphazardly or not in respectful manner.What do you mean? Explicitly having to set
if=andof=is way harder to screw up than mixing up the order of arguments for e.g.cp.Unless you forget what if and of mean. With
cpit’s simply “cp what where”. Never had problems remembering that.is it really hard to remember infile and outfile?
No, but you’re just typing if and of, not infile and outfile, and the letters are right next to each other on a qwerty kbd. One can haphazardly misuse a lot of commands, it’s just that some commands may lead to nastier outcomes than others.
I never had any problems with
cpeither. But the post makes it seem likeddis somehow more error prone, which makes no sense to meWell, usually dd is not used as often as cp, so there’s a bigger chance of messing up the parameters, unless you’re careful and rtfm first.
i always just
cat /dev/??? > /dev/nullto make sure the usb blinks
More like *screams into the void*
That’s a good way of doing it
–status=progress. So happy when they added this.
If only I could remember to set
status=progress…I always end up using
killall -USR1from another terminalSo I don’t have to install ddrescue every time I clone a disk from a live USB anymore? Awesome
Always
lsblkbeforedd. The order of /sdX might change from boot to boot. Only /nvme doesn’t change.Why is this?
It’s a design thing. BIOS can know NVMe disks’ location because they’re directly mounted to PCIe. SATA isn’t like this. Similar logic with the RAM slots.
deleted by creator
I am become dd, the destroyer of disks
IMHO, it was a mistake to make USB block storage use the same line of names also used for local hard disks. Sure, the block device drivers for USB mass storage internally hook into the SCSI subsystem to provide block level access, and that’s why the drives are called sd[something], but why should I as an end user have to care about that? A USB drive is very much not the same thing for me as a SCSI harddisk. A NVMe drive on the other hand, kinda sorta is, at least from a practical purpose point of view, yet NVMe drives get a completely different naming scheme.
That aside, suggest you use lsblk before dd.
Yeah lsblk, lsscsi, fdsik -l , go have a coffee, come back later and hit enter on dd
Yeah lsblk, lsscsi, fdsik -l , go have a coffee, come back later and hit enter on dd
Then realize you typed the command wrong and panic when you don’t get an error.
While we’re at it, can we also rename the hard drive block devices back to
hdinstead ofsdagain? SATA might use the SCSI subsystem, but SATA ain’t SCSI.I still made the mistake, when I sleep deprived switched if and of somehow
My then girlfriend wasn’t exactly happy, that all here photos and music, which we just moved off old CDs, that couldn’t be read correctly anymore, and I spent quite some time to finally move themObviously the old CDs and the backup image were thrown out/deleted just a few days earlier, because I proudly had saved the bulk of it - and being poor students having loads of storage for multiple backups wasn’t in reach.
Backing them up again to fresh CDs was on the plan, but I quickly needed a live USB stick to restore my work laptop…Since then I’m always anxious, when working with dd. Still years later I triple check and already think through my backup restoration plan
Which is a good thing in itself, but my heart rate spikes can’t be healthyAt least sata is well on its way towards dying, so the problem will solve itself in some more years.
My machines all have nvme exclusively now, only some servers are left using sata. And I would say the type of user at risk of fucking up a dd command (which 95% of the time should be a cp command) doesn’t deal with servers. Those are also not machines you plug thumb drives into commonly.In 5-10 years we will think of sda as the usb drive, and it’ll be a fun-fact that sda used to be the boot drive.
S-ATA still is the only way to have more than two drives in the system.
My motherboard has 3 nvme bays.
If I saw the need, there are cheap pcie to nvme cards, since (non-sata) nvme is just directing pcie lanes to the ssd anyway.But like I said below, I don’t even have the need to get a single ssd at the currently maximum price-effective size of 4TB, no less two or three.
In my observation putting mass storage into your pc is dying in favor of either not needing that much storage, or putting it in a nas or other internet-accessible device.Even my non-IT friends do things like put their hdd in a usb enclosure and attach it to their (internet accessible) router.
does that mean that you dont use hard drives at all? how many storage have you got?
I have a nas with 32TB. My main pc has 2TB and my laptop 512GB. I expected to need to upgrade especially the laptop at some point, but haven’t gotten anywhere near using up that local storage without even trying.
I don’t have anything huge I couldn’t put on the nas.At this point I could easily go 4TB on the laptop and 8TB the desktop if I needed to.
Spinning rust is comparable in speed to networking anyway, so as long as noone invents a 20TB 2.5’’ hdd that fits my laptop for otg storage, there would be no reason something would benefit from an hdd in my systems over in my nas.Edit:
Anything affordable in ssd storage has similar prices in M.2-nvme and 2.5’'-sata format. So unless you have old hardware, I see the remaining use for sata as hdd-only.
This is the only reason why I still use GUI for making Linux USBs. Can’t trust my ADHD ass to write the correct drive name. Also, none of my USB drives have a light.
Popsicle is pretty nice, it doesn’t let you choose the internal drives afaik.
Luckily, this problem will disappear soon as we’re moving to systems with only nvme drives. Kinda hard to mistake /dev/nvmexny for /dev/sdx.
I’m a cheap ass who mostly gets old hardware, so it’ll probably be a while before I get to see the benefits of that.
Well, try not to shred too many SATA SSDs then until you get there 🤡
“/dev/sdb? It’s sdb? With a B? Yep that’s the flash drive. Just type it in…
of=/dev/sdwhat was the letter again? B? Alright,/dev/sdb. Double check withlsblk, yep that’s the small disk. Are my backups working properly? Alright here goes nothing… <enter>”You all still have a LED inside USB flashdrive?
Yep! I just installed Void about ten minutes ago off a 2GB stick from the mid-2000s. Somehow, those little sticks just keep going!
Same! I have a 4gb white SanDisk stick, from like 12-14 years ago and is still working 💀💀 it even died on me once, and started working again after a few days 😳😳
Keep them around. I was playing with and testing some ~15 years old mobos for work, and they would not boot from any USB3.0 stick I tried. Same images on an 8GB USB2.0 stick booted with no problem.
Name and shame: Biostar motherboard
Don’t worry, you can still buy USB 2.0 sticks nowadays.
They’re priced almost the same as USB 3.whatever sticks. Literally. Add an euro or 2 and double the capacity and go to usb 3.0
for an usb, it might work. For such an old hard drive, it won’t. Linux will refuse to boot
I don’t think so. Block device is a block device.
Maybe you have better knowledge, please elaborate.
i know it from experience. When i wanted to install a modern Linux on a 2009 hdd, it installed, but simply refused to boot, even though hdsentinel said the hdd is 100℅ healthy
?
I buy them specifically with LED. It s helpful for data transfer, but also helpful for doing a flash of new OS to old nas hardware… You have to hold reset button in on nas until you see it start to read USB (by LED) then you know you can release the reset button.
/dev/disk/by-id/xxx works for me. Never made a mistake.
Remember kids, always lsblk before you dd
heh i do it hardcore, my USB has no light ;)
Don’t confuse if and of!
don’t cross the streams
ls /dev > /tmp/before
<insert usb>
ls /dev > /tmp/after
<repeat two more times>
diff /tmp/before /tmp/after
<sweating>You could just open gnome disks
ok grandma, go back to facebook /s
