sbv3000

Installation FAQ

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1 - Where can I download the boot loaders from and which hardware version loader (DS3615xs, DS3617xs or DS916+) should I use?


Boot loaders, both current (DSM 6.x) and previous (DSM 5.x) versions can be found here:

 

For DSM 6.x onward, it is strongly recommended that you read this topic (at least the OP) made by the developper of the loader, @jun:

 

Also, as for which hardware version loader you should use, it basically depends on your hardware but in general the use of DS3615xs is advisable.

The other 2 hardware version loaders, namely DS3617xs and DS916+ are those who have more specific needs. I recommend looking at Synology's specs data sheets for those models: DS3617xs and DS916+ and then comparing with your own hardware.

 

Information on DS916+: this hardware version of the loader is not a generic build. It is for boards similar to the official one, otherwise there is no point in using it. In other words, this loader is for Braswell family processors (J3160 N3710 etc) and its kernel is optimised for those processors. The loader was added for hardware transcoding support. For desktop/mobile processors, 4th Gen Core processor or later is required to provide necessary instruction features. For example, i7-4700mq works, but e3-1230v2 complains about undefined instructions (source: Jun's post 11/04/2017, Jun's post 12/04/2017, Jun's post 08/01/2018)

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3 - How can I use SHR in DSM6?

 

SHR can be re-enabled by editing the 'synoinfo.conf' file, located under '/etc.defaults'
Comment out (or delete) the line:

supportraidgroup="yes"

and add:

support_syno_hybrid_raid ="yes"
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4 - How many drives can I use?

 

Community members have tried systems with up to 24 drives that are stable. There is a physical limit of 26 drives due to limitations in drive addressing in Linux

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6 - Do I need a serial port connection

 

A serial port is required to see extended boot information/driver loading and errors, to carry out diagnostics, but not needed for normal use

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7 - After the Grub boot menu, my monitor shows a message 'booting from kernel' and nothing else - whats wrong?

 

This is normal for XPE 6 boot loader - connect a serial port to see more diagnostics or use Synology Assistant to connect to the NAS

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8 - Do I need a keyboard and monitor attached all the time?

 

A keyboard and monitor is useful for initial setup to choose the grub boot menu option and check initial boot loading, after than the they are not required.

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9 - How should I set DSM automatic updates?

 

DSM automatic updates should be disabled in Control Panel > Update & Restore to avoid bricking your box if an update is not compatible with the loader. ALWAYS check the forum before applying an update manually.

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10 - What MAC address should I use in the grub configuration settings?

 

It is recommended but not a requirement to set the grub configuration MAC address to be the same as the installed network adapter. You can check your NIC's MAC address by either looking at the BIOS or launching a live OS such Ubuntu.

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11 - The HDD slot numbers in Storage Manager do not match the ports on my disk controller - why?

 

Storage Manager determines drive numbers based on the enumeration of controllers at a bus/slot level, which cannot be changed. Manually recording disk slots/serial numbers/controller ports is a recommended workaround.

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12 - How can I regain high amounts of reserved memory when looking in DSM's Resource Monitor?

 

Add

disable_mtrr_trim

to the 'set common_args_3615' line in the grub.cfg file contained in the loader (applicable to jun's loader). It should look something like this:

set common_args_3615='disable_mtrr_trim syno_hdd_powerup_seq=0 HddHotplug=0 syno_hw_version=DS3615xs vender_format_version=2 console=ttyS0,115200n8 withefi elevator=elevator quiet'

That should give you back all the reserved RAM.

 

Note:  DS3617xs use 'set common_args_3617' and DS916+ uses 'set common_args_916'

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13 - I need/want to reinstall DSM. I am worried about my data. What should I do?

 

Reinstalling DSM does not impact your data since user data is stored on a different partition than DSM. However all packages might need to be reinstalled and settings to be reconfigured.

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14 - What is the minimum VMDK size one can have in DSM?

 

The minimum size one can allocate to a VMDK is 5GB. Below that you will get an Failed to format the disk (35) error during the installation.

 

It should also be noted that this error may appear on baremetal installations where an HDD has not been properly formatted prior being added to you RAID. Refer to this link in case you are in this situation: https://www.synology.com/en-global/knowledgebase/DSM/tutorial/General/What_can_I_do_when_I_get_the_error_message_quot_Failed_to_format_disk_quot_when_formatting_data_partition_during_the_setup

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