Before Terabytes Fall Disk reliability in Windows Vista and beyond презентация

Kerner Program Manager Windows Diagnosis Microsoft Corporation

Optimized platform features enabling your Windows experience, here and now

Leading platform enabling storage fabric adoption

Preferred platform for developing, deploying, and using  storage devices

(Microsoft and Samsung)

works great at work and at home. She couldn’t do her everyday tasks without it. What matters most to her?
CPU power
Network connection
Battery life
Something else…

in 2003
Top driver of Microsoft support’s hardware-related support calls in both client and server
Based on Microsoft figures, disk failures cost many millions of dollars per year in enterprises
Localized failures (bad blocks)
Kernel and user-mode crashes
1.7% of customer-report Microsoft Online Crash Analysis crashes are due to disk errors
Application hangs during read recovery

failure recovery
Repair from redundant copy
Restore from backup

Monitoring And Reporting Technology (S.M.A.R.T.) polling triggers diagnostic
Uses S.M.A.R.T. trip status – no threshold/attribute comparison
Warns user of impending failure and walks them through backup and replacement
Windows Vista backup improvements

has done since Windows 2000
Based on industry feedback, no use of Disk Self-Test or attribute comparison
Failure triggers user-mode code
Filter out duplicate failures
Log SMART READ LOG details to OS event log
Device error count from summary error log sector
Life timestamp from most recent error log entry
Trigger user-context interactive resolution
Customizable by Group Policy
Print instructions, walk user through backup

by disk failures
Automatic failover on boot failure to recovery partition
Optionally deployed by OEM
Available on installation media
Hands-free diagnosis and repair of top non-boot issues

binaries into one-time crash with silent repair from cache
Windows Error Reporting crash handler triggers diagnostic on inpage error crashes due to bad blocks
Diagnoses corrupted system files
Silent repair from System File Cache

than just data recovery
Requires finer-grained failure description to help host choose the best resolution
Increase warning time before failures to allow users to save data

and host to correct failure conditions proactively
Device can report hostile conditions before damage or failure occurs
Host reacts to a device event in real time based on policy and user preference
A proposal for the PRCS protocol has been submitted to T13

before
Disk drive capacity continue to increase
Not every PC user can afford RAID
Deliver on opportunities for improvements beyond S.M.A.R.T.

at risk
Reduce OEM’s customer support costs
Reduce warranty costs for disk drive vendors

sends meaningful PRCS events to the host for correction of hostile conditions and data protection
No translations or guesses required
Host acts on device’s PRCS event proactively according to policy and user preference

when it is at risk
PRCS is designed for end users, not just computer experts
No need to understand a cryptic message to benefit from PRCS. For example: “The previous self-test completed having the electrical element of the test failed”
PRCS enables transparent mitigation of a hostile condition or a recovery process
Users do not need to configure a self-test mode or reporting method
Users control policy as desired

following operating conditions
Temperature Demo
Vibration Demo
Shock Demo
Duty cycle
Altitude
Humidity
A combination of the above conditions
A history of the above combinations

temperature for all HDD suppliers
Environmental temperature increase from 25C to 100C could translate into 10 – 50x shorter life

Samsung HDD Lab Engineering Sample Data

presence of vibration
Effect of vibration is reversible
Cumulative effects of vibration on long term drive reliability is a subject of ongoing research

Samsung HDD Lab Engineering Sample Data

both PC and consumer electronics environments

Shock Modeling

Courtesy: E. Jayson and Frank Talke, UC San Diego

Op. Shock Scratches

Damage by corners, leading edge, and side edges of the slider.

Operating shock damage

Non-operating shock damage

on their operating environments
Temperature and Handling (shock and vibration) are major factors impacting HDD reliability
HDD reliability will be enhanced if OS detects and manages reliability risks and stress events intelligently (PRCS)
Users can improve HDD data reliability by correctly responding to PRCS events

send feedback
Ensure your drives comply with ATA-7 specs to surface device error count and life timestamp
Engage with the Startup Repair team to build a plan for Startup Repair in OEM factory processes
Participate in T13 discussions on PRCS
Plan your device designs in line with PRCS guidelines

Recovery:
Windows Recovery Environment/Startup Repair:
PRCS:

Dfdfeed @ microsoft.com

Dfdfeed @ microsoft.com

Recovery @ microsoft.com

Prcsdisc @ microsoft.com

and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.