I am using the AES-Z7PZ-7Z015-SOM-G Rev C04. When the board is cold started (power up after being powered off for a while) it will boot into Pentalinux but will not load the OS from the eMMC. After a couple of power cycles it will eventually boot al the way up.
I put the SOM and Carrier in a temperature chamber and I could repeat the failure when the set point was less than 20C.
Below is a log of what I am seeing when it fails:
U-Boot 2015.07 (Sep 01 2016 - 14:31:20 -0500)
DRAM: ECC disabled 1 GiB
MMC: zynq_sdhci: 0
SF: Detected S25FL128S_64K with page size 256 Bytes, erase size 64 KiB, total 16 MiB
In: serial
Out: serial
Err: serial
Net: Gem.e000b000
Hit any key to stop autoboot: 4 3 2 1 0
sdhci_transfer_data: Error detected in status(0x208000)!
Device: zynq_sdhci
Manufacturer ID: fe
OEM: 14e
Name: MMC04
Tran Speed: 52000000
Rd Block Len: 512
MMC version 4.4.1
High Capacity: Yes
Capacity: 3.5 GiB
Bus Width: 4-bit
Erase Group Size: 512 KiB
HC WP Group Size: 4 MiB
User Capacity: 3.5 GiB
Boot Capacity: 16 MiB ENH
RPMB Capacity: 128 KiB ENH
** Unrecognized filesystem type **
U-Boot-PetaLinux>
