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RIP my photos from 2017 and contacts from 2005 (lemm.ee)

submitted 9 months ago by summerof69@lemm.ee to c/selfhosted@lemmy.world

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I recently decided to replace the SD card in my Raspberry Pi and reinstall the system. Without any special backups in place, I turned to rsync to duplicate /var/lib/docker with all my containers, including Nextcloud.

Step #1: I mounted an external hard drive to /mnt/temp.

Step #2: I used rsync to copy the data to /mnt/tmp. See the difference?

Step #3: I reformatted the SD card.

Step #4: I realized my mistake.

Moral: no one is immune to their own stupidity 😂

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[–] space@lemmy.dbzer0.com 43 points 9 months ago* (last edited 9 months ago) (11 children)

Fuck up #1: no backups

Fuck up #2: using SD cards for data storage. SD cards and USB drives are ephemeral storage devices, not to be relied on. Most of the time they use file systems like FAT32 which are far less safe than NTFS or ext4. Use reliable storage media, like hard drives.

Fuck up #3: no backups.

[–] AtariDump@lemmy.world 1 points 9 months ago (10 children)

Would an SSD be any better than a pen drive or should it be stored on spinning rust?

[–] space@lemmy.dbzer0.com 6 points 9 months ago (2 children)

Much better. SSDs and HDDs do monitor the health of the drives (and you can see many parameters through SMART), while pen drives and SD cards don't.

Of course, they have their limits which is why raid exists. File systems like ZFS are built on the premise that drives are unreliable. It's up to you if you want that redundancy. The most important thing to not lose data is to have backups. Ideally at least 3 copies, 1 off site (e.g. on a cloud, or on a disk at some place other than your home).

[–] AtariDump@lemmy.world 2 points 9 months ago

RAID is not a backup.

[–] Starayo@lemmy.world 1 points 9 months ago

Though not every fail state is going to show up. If you start seeing weird intermittent behaviour from a drive, for goodness sake find a way to back it up immediately.

My mum's new nuc started having some issues, SMART showed perfect drive health. After trying a few things to diagnose, I rebooted to run memtest and check for bad ram, and that was the last time it ever booted into windows. Controller or something on the nvme ssd died. Far too expensive to try and repair for data recovery. Thankfully had a... Somewhat recent backup. Not as recent as we would have liked.

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