User Manual

*Subject to change without notice Atomos Shogun – User Manual Edition 1: December 2014 6
What you also need
SpinningDiskDrives(HDD)upto108030p/60iHDOnly
These are the raw storage medium for Shogun. You can use either
traditional“spinning”disks,orthenewsolidstatedrives.Choose2½”
spinning drives if your Shogun is going to be attached to a tripod or if it
is not going to be subject to excessive vibration. For harsher conditions,
choose a solid state drive.
Which drives should you use?
There are so many drives available, and newer models appear all the
time. We are not able to test all drives but here are some guidelines.
Speedandreliabilityarethemainfactors.Hereareafewthingsto
bear in mind:
• Disk drive data rates tend to be given in megaBYTES per second,
and codec data rates are normally given in megaBITS per second.
It’s very easy to get confused. But there’s no need to be, because all
you have to do to convert megabits to megabytes is divide by 8. So if
you’re recording at 220 megaBITS per second, that’s going to result
in 220/8 megaBYTES per second, which is 27.5 megaBYTES per
second.
• We recommend at least 7200 RPM drives. Just remember that the
higher the bitrate of the codec you’re using, the faster the drive needs
to be, with 4K recording your data rate doubles from that of HD
recording, please ensure your drive is capable of keeping up with 4K
write speed requirements.
More information regarding ProRes data rates can be obtained
online from Apples ProRes whitepaper PDF document
Atomos regularly test hard drives – please check this link before
purchasing drives: http://www.atomos.com/discovery-what-drives/
Solid State Drives (SSDs) up to 3840x2160p30
These are Flash memory devices that come in the same form-factor as 2
½”diskdrives,andtheyarefullysupportedbytheShogun.
See the section below about when you should consider using SSDs.
Master RAID Caddy
• The Atomos raid caddy is a hardware raid adapter that enables you
to use 2x spinning disk or solid state drives in Raid 0 (Stripe). Raid
technologyallowsgreaterexibilityinyourworkowandrequirestwo
identical drives to properly function.
• Raid 0 (Stripe) is used to increase available storage whilst boosting hard
drive performance, this is achieved by striping data equally across 2
available hard drives.
• Whenusingtheraid0congurationtakeextracarewithyourdrivesand
ensure the hard drive or SSD is raid 0 friendly
IMPORTANT: Raid 0 offers no fault tolerance or redundancy and may
increase your risk of data loss due to failed drives, please exercise caution
when using the raid adapter in rugged environments and ensure you keep
regular backups of recordings.
Pleasecheckourrecommendeddrivespageforcompatiblehard
drivesforusewiththeAtomosShogunRaidCaddyadapter.
http://www.atomos.com/discovery-what-drives/
MechanicalShockandVibrationforSpinningDiskHDD’s
Hard disks are precision mechanical devices that need to be handled
carefully. You will be using the same type of drives that are normally
used in notebook computers, and you can use this as a guide to whether
you need to use mechanical drives or Solid State ones for any proposed
projects. If you think a particular usage scenario would be suitable for a
notebook computer, then it will probably be OK for a mechanical drive
inside a Shogun. If you think the drive inside your notebook might suffer
damage, then don’t use a mechanical drive.
We can’t give rigid guidelines because there are so many different kinds
ofdrives,eachwithdifferentmechanicalproperties.Youmayevennd
variations between drives of the same type.
What we have found is that mechanical drives are suitable for most
purposes that don’t involve harsh vibration or mechanical shocks. They
will be perfect for tripod-mounting, and also for the majority of hand-held
work. We would advise against hard-mounting them on moving vehicles
(but they would probably be OK if cushioned against the body of the
camera operator) and we would not advise using mechanical disks if
there is a likelihood that they might be dropped onto a hard surface.