mdadm Cares About Partition Type

mdadm now starts caring for the partition type when creating a raid volume on partitions. It has to be 'fd' (Linux raid auto).

[used fdisk to create sda1, sda2, sdb1, sdb2. 
sda1 and sdb2's type is 82 (linux swap).
sda2 and sdb2's type is 83 (linux)]

~ $ sudo mdadm --create  /dev/md3 -n 2 -l raid1 --name='raid1 volume set' /dev/sda2 /dev/sdb2

mdadm: /dev/sda2 is too small: 0K
mdadm: create aborted



~ $ sudo mdadm --version

mdadm - v2.5.6 - 9 November 2006


[used fdisk to change sda2 and sdb2 to fd.
"Changed system type of partition 2 to fd (Linux raid autodetect)"]


~ $ sudo mdadm --create  /dev/md3 -n 2 -l raid1 --name='raid1 volume set' /dev/sda2 /dev/sdb

mdadm: array /dev/md3 started. 

(originally from http://microjet.ath.cx/WebWiki/2007.03.28_mdadm_Cares_About_Partition_Type.html)

1994 nissan sentra fuel injector wierdness

We have two 1994 Nissan Sentra here, Put-Put and Pit-Pit. Put is 160K and Pit is 200K. They both still run strong but that is thanks to having 2 fuel injectors replaced.

It started last November when Pit's cylinder #1 fuel injector went bad. It was so unexpected because fuel injector rarely goes bad. I chalked it up to bad fuel filter. So I replaced the fuel injector and filter.

Then two weeks later, Put's cylinder #1 fuel injector also went bad. That was so surprising. What was the chance of two Sentras having bad fuel injector within weeks of each other. I can't blame it on gasoline because the other car, a 1991 Mazda Protege, was not experiencing any problem, and googling for the problem did not indicate that there was a widespread problem with Sentra's fuel injector. I replaced the fuel injector and filter.

The next day, Put's cylinder #3 fuel injector went bad. In less than 24 hours! I replaced it, and there is no more problem so far.

But last week, Pit's cylinder #4 fuel injector went dead again. By this time, I was so good at replacing Sentra's fuel injector, I did the whole thing from start to finish in under 30 minutes. For comparison purpose, the first time I did it I took 6 hours splitted across 2 days.