Re: Correct fdisk info for ext2fs?

Brian:

Thanks so much. I ended up formatting it in OpenBSD 's ffs file
system. Too many issues with Linux.
If I need to transfer data from the Linux computer, then I will ssh
into OpenBSD.

On Thu, May 30, 2024 at 11:04 PM Brian Conway <bconway@rcesoftware.com> wrote:
>
> On Thu, May 30, 2024, at 6:02 PM, nisp1953 wrote:
> > OpenBSD 7.5 GENERIC.MP#82 amd64
> >
> > Hi all:
> >
> > I formatted a 2TB USB Hard Drive under Linux and get the following from fdisk:
> >
> > # fdisk sd1
> > Disk: sd1 geometry: 243201/255/63 [3907029167 Sectors]
> > Offset: 0 Signature: 0x0
> > Starting Ending LBA Info:
> > #: id C H S - C H S [ start: size ]
> > -------------------------------------------------------------------------------
> > 0: 00 0 0 0 - 0 0 0 [ 0: 0 ] Unused
> > 1: 00 0 0 0 - 0 0 0 [ 0: 0 ] Unused
> > 2: 00 0 0 0 - 0 0 0 [ 0: 0 ] Unused
> > 3: 00 0 0 0 - 0 0 0 [ 0: 0 ] Unused
> >
> > I had to add a disklabel before I could mount it and use it on OpenBSD:
> > # disklabel sd1
> > # /dev/rsd1c:
> > type: SCSI
> > disk: SCSI disk
> > label: BUP Slim
> > duid: 3cca86bd1e312e1f
> > flags:
> > bytes/sector: 512
> > sectors/track: 63
> > tracks/cylinder: 255
> > sectors/cylinder: 16065
> > cylinders: 243201
> > total sectors: 3907029167
> > boundstart: 0
> > boundend: 3907029167
> >
> > 16 partitions:
> > # size offset fstype [fsize bsize cpg]
> > c: 3907029167 0 unused
> > i: 3907029167 0 unknown
> >
> > It does have an signed DUID:
> > # sysctl hw.disknames
> > hw.disknames=sd0:c9251986e646484c,sd1:3cca86bd1e312e1f
> >
> > I have been using it for several days and I write to it both under
> > Linux and OpenBSD.
> > What am I doing wrong here that no partitions show un in fdisk?
> > Here is the relevant dmesg info:
> > scsibus4 at umass0: 2 targets, initiator 0
> > sd1 at scsibus4 targ 1 lun 0: <Seagate, BUP Slim, 1708>
> > serial.0bc2ac300000NAEA4KVV
> > sd1: 1907729MB, 512 bytes/sector, 3907029167 sectors
> > /dev/sd1i: file system not clean; please fsck(8)
> >
> > Thanks in advance for any advice on this.
>
> It looks like you have formatted an entire drive without partitioning it first. This isn't wrong *per se*, in the same way you might format certain types of external media without partitioning them, but it's not expected and could become a footgun if you go to perform an operation on the drive and forget that it isn't a filesystem within a partition. As you've noted, it does operate correctly.
>
> Brian Conway
> Owner
> RCE Software, LLC
>