Scrub corruption cases

Name	Description	Expected Result	Comments (if any)
D0-corruption	1. Create 128kb file.(f1.txt) 2. Corrupt D0 Stripe. 3. Run Scrub	D0 should have original un-corrupted content. Parity value should be valid.	RAID5 with 3 drives
D1-corruption	1. Create 128kb file.(f1.txt) 2. Corrupt D1 Stripe. 3. Run Scrub	D1 should have original un-corrupted content. Parity value should be valid.
P-corruption	1. Create 128kb file.(f1.txt) 2. Corrupt Parity Stripe. 3. Run Scrub	P should have original un-corrupted content.
D0-D1-corruption	1. Create 128kb file. (f1.txt) 2. Corrupt both D0 and D1 3. Run Scrub	Scrub expected to fail and should not recover f1.txt.	should Scrub display/log the filename f1.txt as unrecovered along with failed offset?
D0-D1-corruption2	1. Create 128kb file. (f1.txt) and another file with size 128kb (f2.txt) 2. Corrupt both D0 and D1 from f1.txt 3. Corrupt only D0 from f2.txt 4. Run Scrub	Scrub expected not to recover f1.txt. It should recover f2.txt with valid parity.
D1-D3-Corruption	1. Create 256kb file.(f1.txt) 2. Corrupt D1,D3 Stripe. 3. Run Scrub	D1,D3 should have original un-corrupted content. Parity value should be valid.
256kb-P-Corruption	1. Create 256kb file.(f1.txt) 2. Corrupt P1 Stripe. 3. Run Scrub	Parity(P1,P2) value should be valid.
256kb-P2-Corruption	1. Create 256kb file.(f1.txt) 2. Corrupt both P1,P2 Stripe. 3. Run Scrub	Parity(P1,P2) value should be valid.
D0-D1-256kb-Corruption	1. Create 256kb file.(f1.txt) 2. Corrupt D0,D1 Stripe. 3. Run Scrub	Scrub expected to fail and should not recover f1.txt. Parity (P1,P2) should be valid
D0-D1-256kb-Corruption2	1. Create 256kb file.(f1.txt) 2. Corrupt D0,D1,P1 Stripe. 3. Run Scrub	Scrub expected to fail and should not recover f1.txt. Parity (P2) should be valid
Odd-data-stripe-corruption	1. Create 512kb file.(f1.txt) 2. Corrupt odd data stripe. (D1,D3,D5..) 3. Run Scrub	Odd data-stripe should have original un-corrupted content. Parity values should be valid.
Even-data-stripe-corruption	1. Create 512kb file.(f1.txt) 2. Corrupt even data stripe. (D2,D4,D6..) 3. Run Scrub	Even data-stripe should have original un-corrupted content. Parity values should be valid.
Repeat-odd-even-corruption.	Re-run above odd-even corruption cases with different filesize: 1m,2mb,10mb,50mb	All corrupted blocks should have original un-corrupted content. Their coresponding Parity values should be valid.
Device-corruption.	1. Create 100 - 1mb files.(f1..f100.txt) 2. Corrupt all files D0 block. 3. Now replace 1st drive with new drive. 4. Start replace to migrate data from 1st drive. And remove old-corrupted-drive 5. Run Scrub	Scrub should fix all D0 blocks in the new drive and parity values are valid.	valid testcase?
Repeat-drive-corruption	Re-run above device corruption for drive-2 and 3.
Append-data	1. Create large file 1GB.(f1.txt) 2. Corrupt all odd-data stripe blocks. 3. Run Scrub 4. While Scrubbing process running, open the file in write mode and append 500MB data to it.