Document and Entity Information Document	6 Months Ended
	Dec. 28, 2012	Jan. 30, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	SILICON GRAPHICS INTERNATIONAL CORP.
Entity Central Index Key	0001316625
Current Fiscal Year End Date	--06-28
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Dec. 28, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		32,575,748