Linux dealing with IBM i blocksizes (was: How to erase all data on a Power server so it can be transported safely) -- MIDRANGE-L

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Subject: Linux dealing with IBM i blocksizes (was: How to erase all data on a Power server so it can be transported safely)
From: Patrik Schindler <poc@xxxxxxxxxx>
Date: Mon, 9 Mar 2020 22:48:07 +0100
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Hello Larry,

Am 09.03.2020 um 22:32 schrieb DrFranken <midrange@xxxxxxxxxxxx>:

520 vs 512 bytes you say? Who cares, Linux can read those extra big sectors.

Hm. Interesting. From experience with 6607 drives I can tell that the Linux Block layer refuses to access the device.

sd 5:0:3:0: [sdb] Unsupported sector size 522.
sd 5:0:3:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
sd 5:0:3:0: [sdb] 522-byte physical blocks

Can't read from or write to a 0 Byte sized device. :-)

I'd love to see a kernel log excerpt like I provided from your machine.

See here for additional information:
https://try-as400.pocnet.net/wiki/Ordinary_Harddisks_on_the_AS/400

Security by obscurity is no security at all.

That's oh so true!

:wq! PoC

PGP-Key: DDD3 4ABF 6413 38DE - https://www.pocnet.net/poc-key.asc

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Re: Linux dealing with IBM i blocksizes , DrFranken

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