This file is indexed.

/usr/lib/blacs/sdrv.dat is in blacs-test-common 1.1-31.1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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5                       Number of shapes                               
'G' 'U' 'U' 'L' 'L'     UPLO
'E' 'U' 'N' 'U' 'N'     DIAG
5                       Number of matrices
2 1 25 13 0             M
2 7 19 32 0             N
2 3 25 14 1             LDASRC
3 2 25 22 1             LDADEST
1                       Number of src/dest pairs
0 1 3 0                 RSRC
0 0 0 2                 CSRC
0 1 2 0                 RDEST
1 1 0 0                 CDEST
3                       Number of grids
2 4 1                   NPROW
2 1 4                   NPCOL