GNR writes down a chksum to disk (to all pdisks /all "raid" segments ) so that dropped writes can be detected as well as miss-done writes (bit flips..)
From: Aaron Knister <[email protected]>
To: gpfsug main discussion list <[email protected]>
Date: 06/30/2017 07:15 PM
Subject: [gpfsug-discuss] Fwd: FLASH: IBM Spectrum Scale (GPFS): RDMA-enabled network adapter failure on the NSD server may result in file IO error (2017.06.30)
Sent by: [email protected]
I'm curious to know why this doesn't affect GSS/ESS? Is it a feature of
the additional check-summing done on those platforms?
-------- Forwarded Message --------
Subject: FLASH: IBM Spectrum Scale (GPFS): RDMA-enabled network adapter
failure on the NSD server may result in file IO error (2017.06.30)
Date: Fri, 30 Jun 2017 14:19:02 +0000
From: IBM My Notifications <[email protected]>
To: [email protected]
My Notifications for Storage - 30 Jun 2017
Dear Subscriber ([email protected]),
Here are your updates from IBM My Notifications.
Your support Notifications display in English by default. Machine
translation based on your IBM profile
language setting is added if you specify this option in My defaults
within My Notifications.
(Note: Not all languages are available at this time, and the English
version always takes precedence
over the machine translated version.)
------------------------------------------------------------------------------
1. IBM Spectrum Scale
- TITLE: IBM Spectrum Scale (GPFS): RDMA-enabled network adapter failure
on the NSD server may result in file IO error
- URL:
http://www.ibm.com/support/docview.wss?uid=ssg1S1010233&myns=s033&mynp=OCSTXKQY&mynp=OCSWJ00&mync=E&cm_sp=s033-_-OCSTXKQY-OCSWJ00-_-E
- ABSTRACT: IBM has identified an issue with all IBM GPFS and IBM
Spectrum Scale versions where the NSD server is enabled to use RDMA for
file IO and the storage used in your GPFS cluster accessed via NSD
servers (not fully SAN accessible) includes anything other than IBM
Elastic Storage Server (ESS) or GPFS Storage Server (GSS); under these
conditions, when the RDMA-enabled network adapter fails, the issue may
result in undetected data corruption for file write or read operations.
------------------------------------------------------------------------------
Manage your My Notifications subscriptions, or send questions and comments.
- Subscribe or Unsubscribe - https://www.ibm.com/support/mynotifications
- Feedback -
https://www-01.ibm.com/support/feedback/techFeedbackCardContentMyNotifications.html
- Follow us on Twitter - https://twitter.com/IBMStorageSupt
To ensure proper delivery please add [email protected] to
your address book.
You received this email because you are subscribed to IBM My
Notifications as:
[email protected]
Please do not reply to this message as it is generated by an automated
service machine.
(C) International Business Machines Corporation 2017. All rights reserved.
_______________________________________________
gpfsug-discuss mailing list
gpfsug-discuss at spectrumscale.org
http://gpfsug.org/mailman/listinfo/gpfsug-discuss
_______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
