OCLC sent the message below that their systems will be down late Sat Aug 5 - early Sun Aug 6th. People won't be able to use the red search box, Journal A to Z list, or check for full text links in the middle of the night.
As part of ongoing work to maintain and advance our systems, we will perform a disaster recovery exercise on 5-6 August that will require system downtime.
This work will be done in our U.S. data center and will impact all OCLC services. It will not impact independent European-based library management systems.
While we schedule maintenance on dates and times to minimize service disruption, we recognize that this work will impact users. We apologize for any disruption this may cause.
System Downtime Window:
United States Data Center: Saturday, 5 August 2017, 23:00 EDT–Sunday, 6 August 2017, 08:00 EDT (Eastern Daylight Time UTC -4)