Amazon has released new details on the outage which has affected its cloud computing platforms in recent days.
The Amazon Web Services Health Dashboard states that services are now back to normal, and that most user systems and data should be fully restored.
However, Amazon acknowledged that a small fraction of the systems, some 0.07 per cent of volumes stored in its Eastern US region, "would not be fully recoverable".
"The vast majority of affected volumes have now been recovered. We're in the process of contacting a limited number of customers who have EBS volumes that have not yet recovered, and will continue to work hard on restoring these remaining volumes," the company said.
The outage left many of Amazon's client web services crippled or inaccessible for a period of several days, but the firm said that its EC2 and EBS services in northern Virginia are now functioning normally.
Amazon also promised that it will investigate the incident and release a detailed report on the causes.
The company has been heavily criticised for its failure to communicate with customers and warn of the possible repercussions.
Charles King, principal analyst at Pund-IT, told V3.co.uk that the impact of the outage is likely to have been minimised by clients that had planned for such problems and avoided using Amazon's web platforms for essential services.
"The groups that got caught out were the ones that, for better or worse, were treating Amazon Web Services as if it were a primary datacentre," he explained. "It is certainly not meant to be a primary infrastructure."
King believes that Amazon could limit the damage from any future incident by making sure customers realise that outages do occur.
"Amazon needs to make the limitations in this service very clear," he said. "Some companies obviously read the fine print, but the number of sites that got hit badly indicates that Amazon needs to improve its communication."
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