# Trying to build on ARM

**URL:** <https://forum.zcashcommunity.com/t/trying-to-build-on-arm/32850>\
**Category:** Technical Support\
**Created:** [March 6, 2019, 7:44pm UTC](https://forum.zcashcommunity.com/t/trying-to-build-on-arm/32850 "2019-03-06T19:44:25Z")\
**Posts on this page:** 1\
**Showing post:** 83

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**Author:** ![garethtdavies](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/garethtdavies/32/210_2.png) [@garethtdavies](https://forum.zcashcommunity.com/u/garethtdavies)\
**Post date:** [May 25, 2019, 3:01pm UTC](https://forum.zcashcommunity.com/t/trying-to-build-on-arm/32850/83 "2019-05-25T15:01:39Z")

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> [@den](#):
>
> What prevents us from putting the blockchain data available for download as well? I wonder if that could avoid the syncing time issue and requiring extra ram not needed when synced…
> 
> I thought of some companies were selling hardware running bitcoin node including the full blockchain…

Yeh Casa node (and probably others) do this [https://store.casa/lightning-node/](https://store.casa/lightning-node/). It’s about trust vs. verifying the data yourself, see their entry here: [Sunsetting Casa Node and Sats App](https://blog.keys.casa/casa-node-update-1-24-19/)

> We’ve now added the option to resync from Casa, which downloads the chain from Casa’s Bitcoin node. This is much faster than syncing from scratch (it takes about half a day), but **it does require trusting Casa’s blockchain data.** It’s the same level of trust you put in Casa when we presync the node before sending it to you. **As always, there is the option to sync from scratch for users who want to verify the entire chain themselves.**

There’s also the more practical issue of the cost of hosting something like that as the chain is over 20GB so that soon adds up.

There are also a few topics mentioned in this AMA see [Technical AMA w/ Zcash team December 14, 2018 noon PST - #25 by adityapk00](https://forum.zcashcommunity.com/t/technical-ama-w-zcash-team-december-14-2018-noon-pst/32091/25) and [Technical AMA w/ Zcash team December 14, 2018 noon PST - #30 by adityapk00](https://forum.zcashcommunity.com/t/technical-ama-w-zcash-team-december-14-2018-noon-pst/32091/30).

I think best interim step is syncing on a more powerful machine then simply copying the data over.

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