I have a new RPi2 with an 8GB class 10 microSD. I am finding that on a simple system update, pacman pauses for minutes at a time whilst writing data. Is there something known with the RPi2 and writing data like a firmware bug or something I have misconfigured that would explain it (only 1 partition that is ext4 with relatime mount option per ArchARM defaults)?
My system just the base install with a few packages but nothing major yet.
As a test case, I just updated the system as shown below. I sat here with a stop watch to illustrate:
$this->bbcode_second_pass_code('', '# pacman -Syu
...
resolving dependencies...
looking for conflicting packages...
Packages (8) linux-raspberrypi-4.1.12-2 raspberrypi-firmware-20151107-1 raspberrypi-firmware-bootloader-20151107-1
raspberrypi-firmware-bootloader-x-20151107-1 raspberrypi-firmware-examples-20151107-1
raspberrypi-firmware-tools-20151107-1 sudo-1.8.15-1 texinfo-6.0-1
Total Installed Size: 88.32 MiB
Net Upgrade Size: 0.53 MiB
:: Proceed with installation? [Y/n]
(8/8) checking keys in keyring [############################################] 100%
(8/8) checking package integrity [############################################] 100%
(8/8) loading package files [############################################] 100%
(8/8) checking for file conflicts [############################################] 100%
(8/8) checking available disk space [############################################] 100%
(1/8) upgrading linux-raspberrypi [############################################] 100%
>>> Updating module dependencies. Please wait ...
(2/8) upgrading raspberrypi-firmware-bootloader [############################################] 100%
(3/8) upgrading raspberrypi-firmware-bootloader-x [############################################] 100%
(4/8) upgrading raspberrypi-firmware-tools [############################################] 100%
(5/8) upgrading raspberrypi-firmware-examples [############################################] 100%
(6/8) upgrading raspberrypi-firmware [############################################] 100%
(7/8) upgrading sudo [############################################] 100%
(8/8) upgrading texinfo [############################################] 100%
')
The first pause started on 6/8 where pacman just seemed to freeze for 20 sec.
2nd pause started on 7/8 about 66 % through it where pacman froze for 21 sec.
3rd pause happened on 8/8 just after it hit 100 % through it where pacman froze for 1m14sec.
The total time it took to install these packages was 3m33sec.