CCR1009-7G-1C-1S+PC Cloud Core Router max microSD card size

RouterOS General
1

Hi,

I have a Mikrotik CCR1009-7G-1C-1S+PC Cloud Core Router.
Does anyone know what is the max microSD card size? I want to buy a 64GB card if it is compatible.

Thanks & br,
Halacs

2

My question is… Why would they limit the possible size of such a card, its not some cheap chinese car video cam knockoff :wink:

3

I saw so many devices with such a limitations. For example, I have a Hikvision network video recorder has 2 SATA disks with 4TB storage limit. Don’t know why. Mikrotik didn’t show anything on the datasheet about this.

4

There are 3 main SD spec families: original SD, SDHC and SDXC … while they are electrically compatible, they are not completely compatible on protocol level. Each comes with its maximum size: 2GB for original SD, 32GB for SDHC and 2TB for SDXC. They also come with different default files systems: FAT16 for SD, FAT32 for SDHC and exFAT for SDXC.
Hence max supported SD size does depend on HW support (support for particular protocol) and SW support (support for particular filesystem, until recent kernel versions Linux lacked proper RW support for exFAT). The later (SW support) can be offset by formatting SD card to some other (non-standard) file system, such as ext3 (as ROS does).

5

So the question is now simplified a bit: is original SD, SDHC or SDXC supported by my router.
Software side is then clear with ext3: we can say there is no limitation in practice from software point of view. Thanks for the comment!

6

As the support didn’t answer I had to take the risk and I bought a 64GB microSD card.
So the answer is: 64GB card is supported, router could format it to ext3 but seems to be unusable as it is not stable at all.
After a reboot microSD gets ejected/unmounted and cannot be remounted without pulling it out and back. Same microSD attached to USB port works fine.