Re: Beating a dead horse

["William A. Mahaffey III" <wam%hiwaay.net@localhost>]

On 11/24/15 00:01, Felix Deichmann wrote:
> 2015-11-23 18:11 GMT+01:00 William A. Mahaffey III <wam%hiwaay.net@localhost>:
> > [his alignment]
> >
> > Partitions aligned to 2048 sector boundaries, offset 2048 <------ *DING DING
> > DING* !!!!
> >
> > [your alignment]
> >
> > Partitions aligned to 16065 sector boundaries, offset 63 <----- *DING DING
> > DING* !!!!
> My first thought when reading this was that you could have an
> "Advanced Format" disk with 4K sectors (as you have 1 TB 2.5" drives,
> especially then this can be the case!), but your alignment at a first
> look seems horribly wrong for such a disk, which would lead to your
> "slow I/O"...
> Can you investigate this further? And what is the exact disk model you use?
> Apart from that, there are in fact tools which can correct this
> misalignment (but always make a backup before :)). Most drive
> manufacturers offer a free version of an Acronis tool for their
> products.
>
> Felix


atactl identifies the drives as:


4256EE1 # atactl  wd0 identify
Model: HGST HTS721010A9E630, Rev: JB0OA3J0, Serial #: JR10046P1D5UXN
World Wide Name: 5000CCA7DCD3A1DD
Device type: ATA, fixed
Capacity 1000 Gbytes, 1953525168 sectors, 512 bytes/sector
Cylinders: 16383, heads: 16, sec/track: 63
Physical sector size: 4096 bytes
First physically aligned sector: 8
Command queue depth: 32
Device capabilities:
        DMA
        LBA
        ATA standby timer values
        IORDY operation
        IORDY disabling
Device supports following standards:
ATA-2 ATA-3 ATA-4 ATA-5 ATA-6 ATA-7


Could you expand a bit further on those tools :-) ? Are they NetBSD 
ported ? CLI tools ? Work on booted/running drives or need to be invoked 
before/during boot ? Inquiring minds wanna know ;-) ? I will google a 
bit & see what I can turn up. Thanks & TIA for any further clues ....


--

	William A. Mahaffey III

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