Re: Limits of the Apple Partition Map

Never mind, I got it.  The APM is good up to 2 TB and I'm just below
that.  I had thought it was a limit of 128 or 256 GB...somewhere in
that range.

On 10/16/23, Bradley Pearce <[email protected]> wrote:
> Hi.
> I just came across a potential concern for one of my NetBSD systems.
> It's an Apple Network Server 700/200 with an external SATA raid box.
> I partitioned that raid as below:
> (From pdisk):
> Name of device: /dev/wd0
>
> Partition map (with 512 byte blocks) on '/dev/wd0'
>  #:                type name         length   base       ( size )
>  1: Apple_partition_map Apple            63 @ 1
>  2:     Apple_UNIX_SVR2 ext.raid 3906928560 @ 64         (  1.8T) S2
> UFS k0  /usr
>  3:          Apple_Free Extra            16 @ 3906928624
>
> Device block size=512, Number of Blocks=3906928640 (1.8T)
> DeviceType=0x0, DeviceId=0x0
>
> So, I used an Apple partition map when I set that up (via pdisk).
> Doesn't the APM have a size limitation?  The raid is working fine and
> I am storing *real* things on there.  I didn't encounter any issues
> partitioning and formatting.  Have I put myself into a position where
> I might start silently loosing data because of the APM?  Such as, once
> I've filled it up past some APM limit, the data past that become
> unreadable, or such?
>
> Or am I ok?
>
>
> Thanks,
> Bradley Pearce
>