发明名称 |
Recovering file system blocks of file systems |
摘要 |
A method is used in recovering file system blocks of file systems. A first read error is encountered upon reading a file system block of a file system. The file system block includes a first set of chunks. A second read error is encountered upon reading a duplicate copy of the file system block. The duplicate copy of the file system block includes a second set of chunks. Each chunk of the first and second sets of chunks is evaluated. Based on the evaluation, the file system block is recovered. |
申请公布号 |
US9003227(B1) |
申请公布日期 |
2015.04.07 |
申请号 |
US201213539084 |
申请日期 |
2012.06.29 |
申请人 |
EMC Corporation |
发明人 |
Patel Dixitkumar Vishnubhai;Vempati Srinivasa Rao;Bono Jean-Pierre;Dai Luogeng |
分类号 |
G06F11/00;G06F11/16 |
主分类号 |
G06F11/00 |
代理机构 |
|
代理人 |
Bhayana Deepika;Reyes Jason A.;Gupta Krishnendu |
主权项 |
1. A method for use in recovering file system blocks of file systems, the method comprising:
encountering a first error upon accessing a file system block of a file system, wherein the file system block includes a first set of chunks; encountering a second error upon accessing a duplicate copy of the file system block, wherein the duplicate copy of the file system block includes a second set of chunks, wherein each chunk of the second set of chunks includes a duplicate copy of respective chunk in the first set of chunks; determining a list of chunks from the first set of chunks by evaluating each chunk of the first set of chunks, wherein a read error is encountered upon reading each chunk of the list of chunks; based on the evaluation, evaluating the second set of chunks for determining whether the read error is encountered upon reading a respective duplicate copy of each chunk of the list of chunks from the second set of chunks; and based on the evaluation, recovering the file system block by creating a temporary copy of the file system block using information from the first and second sets of chunks. |
地址 |
Hopkinton MA US |