]>
Commit | Line | Data |
---|---|---|
11fdf7f2 | 1 | #!/usr/bin/env bash |
7c673cae FG |
2 | |
3 | # copy a linear file from srcFile to destination disk in a loop until writeSize MBs is written | |
4 | # destinationDisk is a SMR Host Aware Disk eg. /dev/sdb | |
5 | ||
6 | if [ "$#" -lt 3 ]; then | |
7 | echo "Usage ./linearCopy.sh srcFile destinationDisk writeSize(MB)" | |
8 | exit | |
9 | fi | |
10 | ||
11 | if [ "$(id -u)" != "0" ]; then | |
12 | echo "Please run as sudo user" | |
13 | exit | |
14 | fi | |
15 | ||
16 | srcFile=$1 | |
17 | destDisk=$2 | |
18 | writeSize=$3 | |
19 | verbose=true | |
20 | ||
21 | if [ -f time ]; then | |
22 | rm -rf time | |
23 | fi | |
24 | ||
25 | #chunkSize=4096 # in bytes | |
26 | chunkSize=1048576 # in bytes | |
27 | fileSize=`stat --printf="%s" $srcFile` | |
28 | ||
29 | numChunksInFile=`echo "$fileSize * (1048576 / $chunkSize)" | bc` | |
30 | chunksLeft=$(( $(($writeSize * 1048576)) / $chunkSize)) | |
31 | ||
32 | ||
33 | echo "fileSize = $fileSize" | |
34 | ||
35 | if [ "$(($fileSize % 512))" -ne 0 ]; then | |
36 | echo "$srcFile not 512 byte aligned" | |
37 | exit | |
38 | fi | |
39 | ||
40 | if [ "$(($chunkSize % 512))" -ne 0 ]; then | |
41 | echo "$chunkSize not 512 byte aligned" | |
42 | exit | |
43 | fi | |
44 | ||
45 | if [ "$fileSize" -lt "$chunkSize" ]; then | |
46 | echo "filesize $fileSize should be greater than chunkSize $chunkSize" | |
47 | exit | |
48 | fi | |
49 | ||
50 | ||
51 | numFileChunks=$(($fileSize / $chunkSize)) | |
52 | if [ $verbose == true ]; then | |
53 | echo "numFileChunks = $numFileChunks" | |
54 | fi | |
55 | ||
56 | smrLBAStart=33554432 # TODO query from SMR Drive | |
57 | #smrLBAStart=37224448 | |
58 | ||
59 | offset=$(( $smrLBAStart / $(( $chunkSize / 512)) )) | |
60 | ||
61 | if [ $verbose == true ]; then | |
62 | echo "chunksLeft = $chunksLeft, offset = $offset" | |
63 | fi | |
64 | ||
65 | chunkNum=0 | |
66 | ||
67 | while [ "$chunksLeft" -gt 0 ]; do | |
68 | chunkNum=$(($chunkNum + 1)) | |
69 | if [ $verbose == true ]; then | |
70 | echo "CHUNK $chunkNum `date +%H:%M:%S`" >> time | |
71 | fi | |
72 | dd if=$srcFile of=$destDisk seek=$offset bs=$chunkSize 2> tmp | |
73 | cat tmp | grep MB >> time # > /dev/null 2>&1 | |
74 | if [ $verbose == true ]; then | |
75 | echo "chunksLeft = $chunksLeft, offset = $offset" | |
76 | fi | |
77 | chunksLeft=$(($chunksLeft - $numFileChunks)) | |
78 | offset=$(($offset + $numFileChunks)) | |
79 | done | |
80 | ||
81 | if [ -f tmp ]; then | |
82 | rm tmp | |
83 | fi | |
84 | ||
85 | if [ $verbose == false ]; then | |
86 | rm time | |
87 | else | |
88 | echo "Time Stamp for Chunk Writes" | |
89 | cat time | |
90 | rm time | |
91 | fi |