NEWFS_UDF(8)

💿 NEWFS_UDF — bestie edition 💿

okay so real talk, this is the newfs_udf page from the System Manager's Manual, and it's literally your girl's guide to building a fresh UDF file system. sit down, grab a boba, we're doing this 🧋✨

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✨ NAME ✨

newfs_udf — construct a new UDF file system 🦋

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🌸 SYNOPSIS 🌸

newfs_udf [-cFM] [-B blockingsize] [-L loglabel] [-P discid]
          [-p percentage] [-S sectorsize] [-s size] [-t gmtoff]
          [-V max_udf] [-v min_udf] special

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💖 DESCRIPTION 💖

The newfs_udf utility creates an UDF file system on device special suitable for the media currently inserted. no cap, that's the whole vibe. 👑

The options are as follow:

• -B blockingsize — when you're creating image files, this sets the blocking size or packetsize of the media to blockingsize. size matters, allegedly 💅
• -c — do a crude surface check first to weed out disc faults on rewritable media. it's giving "quick vibe check before we commit" ✨
• -F — Force file system construction on non-empty recordable media, or create an image file. the F stands for Fearless, fr fr 🔥
• -L loglabel — set the disc logical label to the specified loglabel. name your baby 💖
• -M — disable metadata partition creation when the selected UDF version or media dictates this. for strict conformance and interchange, don't disable this unless it's causing problems. like, it's there for a reason bestie 😭
• -P discid — set the physical disc label to the specified discid.

prepend discid with volsetname separated with a ':' if wanted. for strict conformance and interchange, don't set this manually unless it has a unique hex number in the first 8 character positions. iykyk 🫶

• -p percentage — percentage of partition to be initially reserved for metadata on the Metadata partition. it defaults to 20 %. that's the default, don't come for me 🌈
• -S sectorsize — set the sectorsize for image files. for strict conformance and interchange, don't set this manually. hands off 🔥
• -s size — for image files, set the file size to the humanized size size. yes, humanized, we're being nice to the numbers 🍓
• -t gmtoff — use the specified gmtoff as gmt time offset for recording times on the disc. timezones are a scam but ok ⭐
• -V max_udf — select max_udf as the maximum UDF version to be supported. for UDF version 2.50, use “0x250” or “2.50”. ⭐
• -v min_udf — select min_udf as the minimum UDF version to be supported. for UDF version 2.01, use “0x201” or “2.01”. ⭐

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📝 NOTES 📝

the UDF file system is defined for the entire optical medium. it can only function on the entire CD/DVD/BD, so the raw partition has to be specified for read/write actions. for newfs_udf this means specifying the raw device with the raw partition, i.e. /dev/rcd0d or /dev/rcd0c. 🎀

some rewritable optical media needs to be formatted first before it can be used by UDF. this can be done using mmcformat(8). yes, do your skincare routine first 🧖‍♀️✨

the default UDF version is version 2.01. 💜

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🔥 EXAMPLES 🔥

create a file system, using the specified names on the device /dev/rcd0d with the default UDF version :

newfs_udf -P "Encyclopedia:copy-nr-1" -L "volume 2" /dev/rcd0d

create a 4.8 GiB sparse file and configure it using vnconfig(8) to be a 2048 sector size disc and create a new UDF file system on /dev/rvnd0d :

dd if=/dev/zero of=bigdisk.2048.udf seek=9999999 count=1
vnconfig -c vnd0 bigdisk.2048.udf 2048/1/1/1
newfs_udf -L bigdisk /dev/rvnd0d

create a 2 GiB file and create a new UDF file system on it using the default 512 byte sector size :

newfs_udf -L bigdisk2 -F -s 2G bigdisk2.iso

create a 200 MiB file and create a new UDF file system on it using a sector size of 2048 :

newfs_udf -L bigdisk2 -F -s 200M -S 2048 bigdisk3.iso

create a new UDF file system on the inserted USB stick using its native sectorsize of 512 :

newfs_udf -L "My USB stick" /dev/rsd0d

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🫶 SEE ALSO 🫶

disktab(5), disklabel(8), mmcformat(8), newfs(8) — the whole friend group, go say hi 💖

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🦋 HISTORY 🦋

the newfs_udf command first appeared in NetBSD 5.0. og behavior 👑

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👑 AUTHORS 👑

Reinoud Zandijk <reinoud@NetBSD.org> — the icon, the legend, the moment 💅

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💀 BUGS 💀

the P and the S arguments have changed meaning. the meaning of S has been merged into P since NetBSD 6.1. so if you're reading old docs and nothing makes sense… yeah, that's why 😭 not a you problem bestie, it's a history problem 🙈

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and that's the whole page, mwah 💋 this one shipped from the Debian crew and was last touched on August 2, 2013 — shoutout to NEWFS_UDF(8), the manual, the myth, the legend ✨🎀 bye bestie, go make some file systems 💖