Methods of migrating data between storage apparatuses
First Claim
1. In a computer system including at least a host computer, a first file server and a second file sever, the first file server comprising:
- a module that reads data and attribute information of at least one file stored in the second file server; and
a module that stores the data and the attribute information of the file read out in the first file server without changing contents of the attribute information.
1 Assignment
0 Petitions
Accused Products
Abstract
A data migration system is provided for migrating data between an existing file server apparatus and a new file server apparatus in a computer system that includes a plurality of host computers and a plurality of file server apparatuses that are mutually connected to one another. The data migration system on the new file server apparatus copies file attributes unique to the network attached storage (NFS) and file attributes unique to the common internet file system (CIFS) from the existing file server apparatus, and stores the file attributes without changing the file attributes in the new file server apparatus. Then actual data is moved from the existing file server to the new file server. When a file access to data is made from a host computer during the file migration process, and if the data has not been migrated from the existing file server to the new file server, the data is read out from the existing file server onto the new file server, and the file access is processed by the new file server as if the existing file server were processing the file access.
187 Citations
22 Claims
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1. In a computer system including at least a host computer, a first file server and a second file sever, the first file server comprising:
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a module that reads data and attribute information of at least one file stored in the second file server; and
a module that stores the data and the attribute information of the file read out in the first file server without changing contents of the attribute information. - View Dependent Claims (2)
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3. A file migration method for migrating data in a computer system including at least one computer, and a plurality of file servers each having a storage device, the file migration method comprising:
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reading attribute information of at least one file from a storage device of a first file server and storing the read attribute information in a storage device of a second file server; and
storing in the storage device of the second file server actual data of the file read from the storage device of the first file server according to the attribute information of the file. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A file migration method for migrating data in a computer system including at least one host computer, an existing first file server and a new second file server, each of the first file server and the second file server having a storage device, the file migration method comprising:
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reading attribute information of a directory from the storage device of the first file server according to a first file access protocol and storing the read attribute information of the directory in the storage device of the second file server;
reading attribute information of the directory from a storage device of the first file server according to a second file access protocol and storing the read attribute information of the directory in the storage device of the second file server; and
obtaining actual data of files from the storage device of the first file server and storing in the storage device of the second file server the actual data of the files read from the storage device of the first file server according to the attribute information stored in the storage device of the second file server. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A file migration method for migrating date in a computer system including at least one host computer and at least one existing file server, the file migration method comprising the steps of:
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disconnecting the existing file server from the computer system;
adding a new file server and connecting the existing file server to the new file server;
reading out a directory tree structure of the existing file server and storing the directory tree structure in the new file server;
reading out all files in the existing file server and successively writing the files into the second file server according to the directory tree structure. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification