I recently purchased a couple LSI SAS9211-8i from Ebay and needed to flash them to IT-mode. The system that I used to flash the card used UEFI and required some esoteric steps to perform the flash operation.
First, a bootable USB stick is needed… maybe? I’m not sure if UEFI requisite bootable sticks or just a FAT32 formatted device. I didn’t test this.
Also needed are,
Extract and copy both of these to the root directory of the USB stick.
Insert the USB stick and boot into the bulit-in EFI shell. This was selected by accessing the boot menu (pressing F11 during BIOS initialization on my motherboard). In this shell, we need to identified the USB device. The command
map –b was helpful. This identified my USB stick as device 0. To flash the card I then issued,
$ sas2flash.efi -o -e 6
$ sas2flash.efi -o -f 2118it.bin -b mptsas2.rom
And that’s it. These are just my high-level notes for what’s needed. There are some great resources online that dive into these steps in additional details. I found the following helpful:
- https://nguvu.org/freenas/Convert-LSI-HBA-card-to-IT-mode/ (for non-UEFI, flashed using FreeDOS)
To enable git to sign commits we must configure the key to be used for signing. This can be accomplished by editing
name = Matt Kowalczyk
email = firstname.lastname@example.org
signingkey = A53C8900B710D91F
Also, if you have both
gpg2 installed on your system, you may need to force git to use a specific program to perform the signing. In my case, I needed to use
gpg2 and this was accomplished by appending the below to
program = gpg2
With these changes, we’re now able to sign commits and tags and also verify these signatures. For instance,
$ git add foo.txt
$ git commit -S -m "initial commit"
[master (root-commit) 7f5db95] initial commit
1 file changed, 1 insertion(+)
create mode 100644 foo.txt
$ git log --show-signature
gpg: Signature made Sat 08 Jun 2019 07:51:46 PM PDT using RSA key ID 951E6431
gpg: Good signature from "Matt Kowalczyk email@example.com" [ultimate]
Author: Matt Kowalczyk firstname.lastname@example.org
Date: Sat Jun 8 19:51:46 2019 -0700
Notice the use of
--show-signature. The git-scm shows various other ways of useful git commands related to signing. For instance,
$ git merge --verify-signatures -S <BRANCH>
$ git rebase -S
I’ve recently become fascinated by Erlang. I like it’s maturity, scale, and it’s methodology. It’s taken me a couple passes through https://learnyousomeerlang.com/ and Programming Erlang and hours of reading the very well written Erlang docs to become familiar enough to write some simple code.
I’ve decided to implement the constant database, cdbin Erlang. It was a really fun project that required me to,
- Implement a stand alone library in Erlang
- Write tests
- Twiddle bits
- File I/O
Which I think are some fundamental steps to start understanding a development environment. I’ve released the code as under the MIT License on github.
I’ve generated a printable version of the Ethereum Yellow Paper. It features a white background. The original can be found here.