xl: Remove check-dir in ReadVersion (#11200)

The only purpose of check-dir flag in
ReadVersion is to return 404 when
an object has xl.meta but without data.

This is causing an extract call to the disk 
which can be penalizing in case of busy system
where disks receive many concurrent access.

cmd/erasure-decode.go

@@ -33,6 +33,7 @@ type parallelReader struct {
 	readers       []io.ReaderAt
 	orgReaders    []io.ReaderAt
 	dataBlocks    int
+	errs          []error
 	offset        int64
 	shardSize     int64
 	shardFileSize int64
@@ -49,6 +50,7 @@ func newParallelReader(readers []io.ReaderAt, e Erasure, offset, totalLength int
 	return &parallelReader{
 		readers:       readers,
 		orgReaders:    readers,
+		errs:          make([]error, len(readers)),
 		dataBlocks:    e.dataBlocks,
 		offset:        (offset / e.blockSize) * e.ShardSize(),
 		shardSize:     e.ShardSize(),
@@ -169,6 +171,8 @@ func (p *parallelReader) Read(dst [][]byte) ([][]byte, error) {
 				// This will be communicated upstream.
 				p.orgReaders[bufIdx] = nil
 				p.readers[i] = nil
+				p.errs[i] = err
+
 				// Since ReadAt returned error, trigger another read.
 				readTriggerCh <- true
 				return
@@ -191,7 +195,7 @@ func (p *parallelReader) Read(dst [][]byte) ([][]byte, error) {
 		return newBuf, nil
 	}
 
-	return nil, errErasureReadQuorum
+	return nil, reduceReadQuorumErrs(context.Background(), p.errs, objectOpIgnoredErrs, p.dataBlocks)
 }
 
 type errDecodeHealRequired struct {