All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: How do harddrives protect themselves against shock?
PostPosted: July 1st, 2021, 12:25 
Offline

Joined: July 1st, 2021, 12:11
Posts: 4
Location: Netherlands
This is my third topic I know. But it seems this forum requielres approval first. And I have a curious mind and always have lots of questions.

I have never used small laptop hard drives before in a mobile device like a laptop. Nor any external ones in enclosures. I am gonna try one now a Toshiba. But I am wondering how and if mechanical harddrives protect themselves against possible real life shocks to the device in mobile applications. I heard that brand new drives are specially locked within until the first power on. To prevent DOA from the shop to customer. Is this true. What other protection features do these devices have?


Top
 Profile  
 
 Post subject: Re: How do harddrives protect themselves against shock?
PostPosted: July 2nd, 2021, 15:32 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
Drives park their heads on a ramp.

Shock protection is implemented via shock sensors, rotational vibration sensors and tri-axis accelerometers.

http://www.hddoracle.com/viewtopic.php?f=100&t=2637

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: How do harddrives protect themselves against shock?
PostPosted: July 3rd, 2021, 8:53 
Offline

Joined: September 29th, 2005, 4:10
Posts: 402
Location: Moscow
fzabkar wrote:
Drives park their heads on a ramp.

Shock protection is implemented via shock sensors, rotational vibration sensors and tri-axis accelerometers.

http://www.hddoracle.com/viewtopic.php?f=100&t=2637


The sensor cannot protect HDD from impact. When the sensor is triggered, the impact is already there. Its purpose is to stop recording when vibrations occur, so that the data does not record past the track.
Park the heads during the impact - scratch the plates.


Top
 Profile  
 
 Post subject: Re: How do harddrives protect themselves against shock?
PostPosted: July 15th, 2021, 10:47 
Offline

Joined: October 20th, 2014, 5:25
Posts: 138
Location: Sweden
Earlier drives parked their heads over the center of the platter. How did these drives survive head damage upon impact?


Top
 Profile  
 
 Post subject: Re: How do harddrives protect themselves against shock?
PostPosted: July 16th, 2021, 3:43 
Offline
User avatar

Joined: January 28th, 2009, 10:54
Posts: 3452
Location: Greece
bos wrote:
Earlier drives parked their heads over the center of the platter. How did these drives survive head damage upon impact?


They didn't :)

_________________
http://www.northwind.gr
SandForce SSD Recovery
Ransomware Reverse Engineering - NoMoreRansom! partners


Top
 Profile  
 
 Post subject: Re: How do harddrives protect themselves against shock?
PostPosted: July 16th, 2021, 6:44 
Offline
User avatar

Joined: August 15th, 2006, 3:01
Posts: 3464
Location: CDRLabs @ Chandigarh [ India ]
bos wrote:
Earlier drives parked their heads over the center of the platter. How did these drives survive head damage upon impact?

Well,
No they parked in the inner zone and that zone had a different finish of the surface in respect to the other platter sector and the heads can rest on it even if the rotation is there without harm

_________________
Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Google [Bot] and 44 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group